Transfer Behavior of Carbendazim from Dried Yingshan Yunwu Tea Leaves into Tea Infusions

Tea infusion is the main route of human exposure to pollutants in tea,and it is vital to investigate the transfer rate of pollutants from tea leaves to infusion.Carbendazim is a commonly used systemic fungicide,the transfer behavior of which in Yingshan Yunwu tea is not clear.Hence,this study firstly established the analytical method for determination of carbendazim with great accuracy and precision via modified QuEChERS method and ultra-performance liquid chromatography-fluorescence detection(UPLC-FLD).Then,the transfer behavior of carbendazim from tea leaves and infusion was systematically investigated.Results indicated that water temperature and proportion of tea to water ration would obviously increase the transfer rate of carbendazim,but times of infusion repetition showed negative correlation with the transfer rate of carbendazim.In addition,brewing time seemed to have lesser impact on the transfer rate.This study will be helpful for the risk assessment of carbendazim residue and provide the guidance for tea brewing.

Factors controlling the development of carbonate reservoirs of Ordovician Yingshan formation in the Gucheng area, Tarim Basin

Deep carbonate rocks are important targets for oil and gas exploration in China. In recent years, significant oil/gas discoveries have been made in the deep carbonate sequences in the Tarim, Sichuan, Ordos, and Bohai Bay basins. Despite significant oil/gas discoveries, large-scale exploration has not been conducted in the Gucheng area in the Tarim Basin. To break the bottleneck restricting the petroleum exploration in the Gucheng area, this study analyzed the factors controlling the formation of carbonate reservoirs of the Yingshan Formation in the Gucheng area in detail based on the basic geological conditions of the study area and the data from cores, thin sections, well logging, testing, and 3-D seismic survey. The inner shallow-ramp in the Gucheng area acts as the main sedimentary facies zone for the development of high-quality reservoirs. The grainstones formed in the high-energy environment of the inner shallow-ramp laid the foundation for subsequent reservoir development in the study area. The dolomitized shoal grainstones in the inner shallow-ramp have well-developed intercrystalline pores and intercrystalline dissolved pores due to later dolomitization, thus serving as high-quality reservoirs. Strike-slip faults are crucial to reservoir reformation and determine whether high production can be achieved in oil and gas exploitation in the study area. Moreover, later reformation by hydrothermal solutions also plays a constructive role in reservoir formation.

Optimization of Extraction Process of Yingshan Cloud Tea Polysaccharides by Response Surface Methodology

[Objectives] This study was conducted to explore the optimal process conditions for hot water extraction of polysaccharides from Yingshan cloud tea. [Methods] Based on single factor experiments, with the extraction rate of polysaccharides as the response value and liquid-to-solid ratio, extraction temperature and extraction time as investigation factors, the optimum extraction process for tea polysaccharides from Yingshan cloud tea was determined by Box-Behnken central componse design and response surface analysis method. [Results] Under the conditions of the liquid-to-solid ratio of 50∶1(ml/g), the extraction temperature at 94 ℃ and the extraction time of 210 min, the extraction rate of polysaccharides from Yingshan cloud tea reached 2.16%. [Conclusions] This study will provide theoretical basis and reference for subsequent related research.

Forming mechanism of hydrocarbon reservoirs in Yingshan Formation of Yuqi block in Akekule arch,Tarim Basin

The reservoir conditions,oil and gas charge history and accumulation phases were studied for Yingshan Formation of Yuqi block,and an oil and gas accumulation model was established by using the techniques of reservoir prediction,fluorescence thin section and fluid inclusion analysis under the guidance of the theories of oil and gas accumulation.The results indicate that the main rock types in Yingshan Formation are micrite and calcarenite.The carbonate reservoirs are of cave,fracture-pore and fracture types,and their physical properties are intermediate;there are at least four oil/gas charges,i.e.late Hercynian,Yanshanian,early Himalayan and middle Himalayan(Cenozoic).The most important charge periods are late Hercynian,early Himalayan and middle Himalayan;the oil and gas accumulation model is self source-lateral expulsion of hydrocarbon-multistage accumulation,or hydrocarbon sourced from and preserved in the same old rocks-long term expulsion of hydrocarbon-multistage accumulation.

Strike-Slip Faults and Their Control on Differential Hydrocarbon Enrichment in Carbonate Karst Reservoirs: A Case Study of Yingshan Formation on Northern Slope of Tazhong Uplift, Tarim Basin

Objective Oil and gas are abundant in the Ordovician Yingshan Formation carbonate karst reservoirs on the northern slope of Tazhong uplift in the Tarim Basin, and have extremely complicated oil-gas-water distribution, however. The difference in burial depth of the reservoirs between east and west sides is up to 1000 m. Water-bearing formations exist between oil- and gas-bearing formations vertically and water-producing wells are drilled between oil- and gas-producing wells. Macroscopically, oil and gas occur at low positions, while water occurs at high positiona on the northern slope of Tazhong uplift. The mechanism of differential hydrocarbon enrichment in heterogeneous reservoirs is by far not clarified, which has affected the efficient exploration and development of oil and gas fields in this area.

Study on Rural Ecotourism Development in Yingshan Area of Chengyu Urban Agglomeration

Chengdu-Chongqing urban agglomeration covers a large number of rural areas.These areas have unique topographic conditions,diverse landscape types,and beautiful natural environment,but the economic conditions are underdeveloped;the ecological environment is fragile and the tourism carrying capacity is low.At the same time,they are facing the problems of lack of tourism facilities and low management level of scenic spots.Taking Yingshan area as an example,this paper evaluates the rural tourism development conditions from the aspects of location conditions,complementarity of tourism resources,highlights of tourism resources,tourist source conditions,and ecological environment,and makes a detailed plan for the functional zoning and tourism products of rural tourism development.The research shows that in order to realize the sustainable development of rural tourism resources,Chengdu Chongqing urban agglomeration should take the global tourism concept as the scientific guidance,ecological protection as the premise,agricultural resources as the basis,and culture as the soul,carry out rational,orderly,and scientific rural ecotourism development,and create high-quality rural ecotourism products.

Origin of gas condensate reservoir in Fuman Oilfield, Tarim Basin, NW China

To understand the reservoir property and hydrocarbon accumulation conditions of the Middle and Upper Ordovician intraplatform shoal between ultra-deep main strike-slip faults in Fuman Oilfield of the Tarim Basin, China, the main strike-slip faults in and around well FD1 in the basin were analyzed in terms of sedimentary facies, sequence stratigraphy, intraplatform shoal reservoir property, and oil and gas origins, based on drilling data. The Yingshan Formation intraplatform shoal between the main strike-slip faults is superimposed with low-order faults to form a new type of hydrocarbon play. Firstly, hydrocarbons generated from the Lower Cambrian Yuertusi Formation source rocks vertically migrated into the second member of Yingshan Formation through the main strike-slip faults, and then migrated laterally until they were accumulated. A small amount of oil from Well FD1 came from the Yuertusi Formation source rocks in the mature stage, and a large amount of gas originated from oil cracking in the ultra-deep reservoirs. Therefore, the secondary gas condensate reservoir in Well FD1 is characterized by high gas to oil ratio, dry gas (dryness coefficient being 0.970) and hybrid origin. This new type of hydrocarbon play characterized by intraplatform shoal and low-order fault suggests a prospect of continuous hydrocarbon-bearing area in Fuman Oilfield, which will expand the ultrap-deep oil and gas exploration in the oilfield.

塔北地区鹰山组下段—蓬莱坝组白云岩成因及控储意义

为确定塔北地区中—下奥陶统鹰山组下段—蓬莱坝组白云岩成因,通过岩心及岩石薄片观察,利用阴极发光、X射线衍射有序度、碳氧稳定同位素、锶同位素和稀土元素组成及配分模式分析,并将岩石学与地球化学特征结合,开展了塔北地区鹰山组下段—蓬莱坝组白云石化作用研究。粉—微晶白云石和粉—细晶他形脏白云石由同生期高盐度海水白云石化作用形成,流体主要源自地表低温蒸发条件下的高盐度海水;粉—细晶自形白云石由早成岩期浅埋藏白云石化作用形成,流体主要源自奥陶纪海水,流体温度因埋藏加深而升高;鞍形白云石由早成岩期热液白云石化作用形成,流体主要源自奥陶纪海水,且有后期深部岩浆热液加入。同生期高盐度海水白云石化作用不产生储集空间,但由于区域局限,蒸发强烈,可伴随石膏沉淀,石膏溶蚀后形成储集空间;早成岩期浅埋藏白云石化作用可形成自形白云石,促进晶间孔的发育,成岩后期溶蚀流体易进入,溶蚀形成晶间溶孔和溶蚀孔隙;早成岩期热液白云石化作用不利于储集空间的形成。

裂缝角度对碳酸盐岩应力敏感性影响研究

通过实验研究了不同角度天然裂缝与人工裂缝对致密碳酸盐岩渗透率的应力敏感性的影响以及人工裂缝多次循环加压、降压对致密碳酸盐岩的渗透率应力敏感性的影响。研究表明,随着有效应力的增大,岩样渗透率先大幅度下降后小幅度下降直至趋于稳定。所有岩样渗透率应力敏感程度随着裂缝角度的增大都有下降的趋势,人工裂缝岩样的渗透率应力敏感程度整体比天然裂缝发育岩样强。

Characteristics and main control factors of Ordovician shoal dolomite gas reservoir in Gucheng area,Tarim Basin,NW China

Based on seismic, drilling data and experimental analysis, the characteristics and main controlling factors of shoal dolomite gas reservoir in the third member of Ordovician Yingshan Formation of Gucheng area, Tarim basin were examined.The study shows that the dolomite gas reservoir in Gucheng area is lithologic gas reservoir controlled by shoal and fault jointly,and its formation is mainly attributed to the following factors:(1) The continuously developing paleotectonic structure has been in the direction of gas migration and accumulation;(2) The large area of medium-high energy grain bank deposited in gentle slope environment is the material basis for the formation of dolomite reservoir;(3) Atmospheric water leaching and dolomitization and fluid dissolution in fault zone are the key factors for the formation of high-quality dolomite reservoir;(4)The natural gas comes from cracking of the ancient oil reservoir and hydrocarbon generation of dispersed organic matter in source rocks, and the NNE-trending strike-slip fault is the dominant channel for vertical migration of natural gas;(5) Limestone cap rocks in the first and second members of Yingshan Formation provide direct sealing for the formation of gas reservoir there. On the basis of comprehensive analysis, it is pointed out that the Gucheng area has three grain shoal zones in the third member of Yingshan Formation in nearly S-N direction, which together with seven strike-slip fault zones in NNE direction control the development of shoal dolomite gas reservoir.

塔里木盆地富满油田凝析气藏成因

基于塔里木盆地FD1井及周围主干走滑断裂钻探成果,从沉积-层序、台内滩储集层和油气成因等方面分析,以揭示超深主干走滑断裂带间中—上奥陶统台内滩储集性能及成藏条件。取得以下地质研究成果和认识:主干走滑断裂带间鹰山组台内滩叠加低序次断裂带构成一种新的成藏组合类型,下寒武统玉尔吐斯组烃源岩生成的油气首先由主干走滑断裂带垂向输导运移至鹰山组2段,然后发生侧向运聚成藏;FD1井少量原油是玉尔吐斯组成熟阶段生成的,而大量的天然气主要为超深油藏原油裂解气,从而形成高气油比的干气(干燥系数为0.970)和混合型次生凝析气藏。这种“台内滩+低序次断裂带”成藏组合新类型预示富满地区有望形成含油气连片局面并将进一步横向拓展富满油田超深领域的油气勘探空间。

英山县古树资源及其空间分布特征

【目的】旨在系统研究湖北英山县古树资源的状况和分布特征,为古树的保护和管理提供参考。【方法】收集了英山县古树资源基础调查数据,并利用ArcGIS建立了古树的DEM分布网络;通过点格局分析探究古树的空间分布规律;应用Spearman和典范相关分析方法研究环境因素对古树生长的影响。【结果】调查到英山县目前有1 097株古树,隶属于22科36属50种;国家一、二级保护植物各有两种;全县的三级古树占全部古树数量的93.53%,一级和二级古树的数量相对较少。根据基于DEM网格和投影坐标网格的分析,较高海拔区域的人类聚集较少,而古树数量较多且生长较好;相反,较低海拔区域的古树数量较少且生长较差。当尺度超过11 km时,古树的分布由聚集逐渐转变为随机;而当尺度达到或超过14 km时,古树呈现均匀分布。古树的生长主要受到坡向的影响,而坡度对古树生长的影响相对较弱。【结论】森林环境和人类活动对古树的影响具有差异性,应针对古树的分布特征,制定相关的古树专业保护方案。

论乡村振兴背景下英山缠花文旅融合发展策略

非物质文化遗产英山缠花产业和英山以花为主题的旅游业深度融合,可为英山实现乡村振兴奠定物质基础,积累精神财富和提供智力支撑。通过深入调研,采取挖掘缠花文化内涵,打造旅游文化场馆;创作本土文化演艺项目,推进文旅融合;运用先进科学技术,丰富文旅业态等途径。配合实施培育桑蚕种养基地,夯实产业基础;扶持蚕丝生产企业,扩大产业规模;创建“英山缠花”品牌,提升文化价值;打造缠花产业链,深化文旅融合等措施。实现英山缠花文旅创新融合,达到活态传承缠花文化,高质量发展旅游业,彼此促进,实现共赢。

英山茗茶生长发育及产量要素的气象影响分析

利用2013—2021年英山国家气象站的气象数据,以英山茶叶为研究对象,选取长冲茶厂为观测区域,重点分析英山茗茶不同轮次茶生育期及产量因素指标变化特征,运用相关分析及显著性检验探讨不同生育期气象要素与产量的相关性。结果表明,不同轮次茶的生育期持续时间为首轮茶>三轮茶>二轮茶。芽密度、平均百芽重和理论鲜叶产量均是三轮茶>二轮茶>首轮茶,实际鲜叶产量则是二轮茶>三轮茶>首轮茶。英山不同轮次茶关键生育期的平均气温和相对湿度均为三轮茶>二轮茶>首轮茶,降水量为三轮茶>首轮茶>二轮茶,日照时数为二轮茶>首轮茶>三轮茶,雾日日数达到50%,满足茶树生长的适生条件。首轮茶的降水量、相对湿度、气温、日照时数随年际变化均呈下降趋势;二轮茶的降水量、相对湿度、日照时数随年际变化均呈下降趋势,而平均气温呈上升趋势;三轮茶的降水量和气温随年际变化均呈上升趋势,而相对湿度和日照时数均呈下降趋势。通过相关分析发现,气温是影响茶叶生长发育产量和品质的首要气象因子,其次是降水量和相对湿度,而日照则起相反作用。

塔里木盆地鹰山组白云岩成因与Mg同位素证据

中—下奥陶统鹰山组作为塔里木盆地中央隆起区潜在的重要勘探接替层系,其白云岩成因认识仍不清楚,因此制约了对该区域的进一步勘探。鹰山组由下至上依次发育白云岩、白云质灰岩和灰岩,表明发生了灰岩向白云岩的交代转化过程。交代白云岩的形成需要足够的含镁流体和长期的镁泵输送机制,而新兴的Mg同位素技术在示踪白云石化流体来源和迁移路径方面已经取得良好效果。因此,本研究通过系统采集鹰山组白云岩、白云质灰岩和灰岩,开展岩石学、微量元素、碳氧同位素和Mg同位素测试。实验结果显示,鹰山组发育6类岩石,分别是泥晶-微晶白云岩(D1)、粉晶-细晶白云岩(D2)、颗粒白云岩(D3)、中晶-粗晶白云岩(D4)、白云质灰岩(DL)和灰岩(L)。鹰山组碳酸盐岩的δ^(13)C_(V-PDB)值为-2.10‰~-0.37‰(平均值-1.37‰),δ^(18)O_(V-PDB)值为-7.51‰~-3.54‰(平均值-5.41‰),δ^(26)Mg值为-4.03‰~-1.28‰(平均值-2.55‰)。δ^(26)Mg、Na含量、Sr/Ba、Mn/Fe、δ^(13)C_(V-PDB)、δ^(18)O_(V-PDB)、古盐度(Z)和古温度(T)在垂向上显示出一定的联动性和系统性。通过综合分析与讨论得出以下几点认识:(1)鹰山组δ^(26)Mg值垂向变化趋势与沉积旋回具有密切联系,沉积旋回的顶部为富镁流体源区,旋回界面为流体迁移通道;(2)识别出4种Mg同位素变化趋势与白云石化流体迁移规律,即云灰互层结构(L→DL→D)、准同生白云岩结构(D1→D2)、渗透回流白云岩结构(D1→D2→D3→D4→L)和埋藏白云岩结构(D4→DL/D);(3)鹰山组白云岩形成主要与海平面周期性波动有关,海平面下降时,蒸发作用促使局限水体中富集Mg^(2+),并且富镁流体会沿着下伏高孔高渗的颗粒灰岩垂向迁移至下伏地层,有利于白云石化作用的持续进行,当富镁流体遇到孔隙度不发育的泥晶灰岩时,富镁流体无法进入矿物晶格中,白云石化作用停止。海平面上升时,局限水体转变为开阔水体,海水与富镁流体源区相互混合,降低了流体的白云石化驱动力,致使白云石化作用逐渐减弱,从而发育灰质白云岩和灰岩;(4)除受海平面控制外,深埋藏阶段经历的多期交代、重结晶或热液作用也有利于鹰山组白云岩的形成;(5)白云石化作用对鹰山组沉积储层具有建设性意义,早期白云石化作用有利于孔隙的继承和保存,而晚埋藏和热液白云石化对储层起破坏作用。

塔河油田主体区下奥陶统小尺度缝洞体形成机制与分布预测

塔河油田奥陶系碳酸盐岩储层的开发方向已逐渐从地震反射的“串珠型”缝洞储层转移到“非串珠”型的小缝洞储层,确定小尺度缝洞的形成机制和发育规律是提高此类储量动用率的关键。本次研究对塔河油田主体区岩心和薄片开展了缝洞描述,确定了小尺度缝洞的裂缝成因类型、缝洞参数和充填性质等特征。研究区裂缝划分为构造裂缝和非构造成因裂缝,呈高角度或垂直产状,构造裂缝充填程度弱于风化裂缝;孔洞的充填程度相对较高,但仍存在残留的孔隙空间。基于古岩溶地貌、局部残丘构造幅度的刻画、断裂特征分析和构造应力场模拟,确定了小尺度缝洞体的形成机制。小尺度缝洞的形成受古岩溶地貌、局部残丘构造幅度、断裂和构造应力场综合控制。地貌相对高部位利于岩溶的发生,主体东区地貌整体较主体西区高,缝洞相对西区更发育。残丘构造幅度也影响了岩溶储层的分布差异,残丘缓翼构造坡度相对较缓,利于水岩充分反应,更利于岩溶储层形成。主大断裂控制大尺度溶洞的形成,同时大溶洞和断裂又控制着小尺度缝洞的发育,深部小尺度缝洞受断裂控制的发育深度可达T_7~4界面以下200 m深度。构造应力场影响着构造裂缝的分布,构造裂缝的形成又为孔洞的形成提供了溶蚀通道,间接控制着小尺度缝洞体的分布。在小尺度缝洞形成机制分析的基础上,建立了基于非线性神经网络深度学习算法的小尺度缝洞预测方法,确定了小尺度缝洞平面分布,预测结果与单井缝洞发育情况和初期产液能力相匹配。研究成果为油田整体动用小尺度缝洞储量奠定了技术基础。

塔里木盆地塔中—顺托果勒地区奥陶系鹰山组碳酸盐岩颗粒滩沉积特征

塔中—顺托果勒地区油气勘探不断取得重大突破已表明该区域蕴藏着丰富的油气资源,而颗粒滩沉积刻画对于沉积环境分析和储层预测具有理论和实践意义。本文通过大量的岩心薄片分析,发现该地区颗粒滩类型主要为内碎屑滩,生物礁体不发育,岩性主要以亮晶碎屑灰岩为主,部分发生白云岩化作用,并且随着深度增加其作用增强。内碎屑滩通常含有一些鲕粒、藻粒和少量生物碎屑,其中鲕粒较小,见低能环境放射鲕。连井对比分析显示:鹰山组可以划分为两个三级层序,并且能在整个塔中地区进行对比,上升半旋回期间颗粒滩沉积以薄层退积为主,下降半旋回期间则以厚层加积为主,而最大海泛面时期颗粒滩发育规模较小。鹰山组沉积时期,颗粒滩在开阔台地和局限台地广泛发育,但两者沉积特征不同,开阔台地颗粒滩沉积厚度较大,呈团块状沿开阔台地外围分布,而局限台地内颗粒滩一般厚度较小,呈小团块或条带状分布。

岩溶缝洞充填物碳氧同位素特征及环境意义——以塔河油田奥陶系鹰山组为例

塔河油田奥陶系鹰山组岩溶缝洞是该地区主要的碳酸盐岩储层,弄清岩溶缝洞充填物特征有利于寻找最优储集体,对该区石油地质研究具有重要意义。通过对塔河油田31口钻井岩心观察、描述和充填物类型统计,选取7口典型钻井奥陶系鹰山组岩溶缝洞充填物取样,并对充填物样品δ^(13)C和δ^(18)O进行测试分析。结果表明:(1)充填物碳氧同位素变化范围较大,δ^(13)C为0.75‰~−10.14‰,δ^(18)O为−5.94‰~−14.14‰。(2)奥陶系鹰山组岩溶缝洞充填物存在4中不同类型的形成环境:同生期或早期成岩岩溶环境、风化壳岩溶环境、埋藏岩溶环境、较晚期岩溶环境。该研究成果对古岩溶型油气储层研究及油气勘探具有重要意义。

塔里木盆地奥陶系缝洞型碳酸盐岩岩溶储层成因及勘探启示

以岩心薄片、实验分析数据、钻录井、测井、地震等资料为基础,按照储层成因机理对塔里木盆地奥陶系碳酸盐岩岩溶储层进行了分类,并对各类储层的分布、储集空间类型及主控因素进行了系统分析。研究结果表明:(1)塔里木盆地奥陶系缝洞型岩溶储层按成因可划分为5类,分别为(准)同生岩溶储层、层间岩溶储层、顺层岩溶储层、潜山(风化壳)岩溶储层和受断裂控制岩溶储层。(2)(准)同生岩溶储层分布于台缘或台内礁滩相,有效储层在台缘连片发育,在台内零星分布,由颗粒灰岩因海平面下降而短期暴露淋溶形成,基质孔和溶缝、溶洞均发育,通常叠加后期层间岩溶作用或潜山岩溶作用,从而形成复合型岩溶储层。(3)层间岩溶储层发育于内幕区,与碳酸盐岩层系内部中短期的平行或微角度不整合面相关,呈准层状分布,储集空间以洞穴型为主,裂缝-孔洞型和孔洞型次之。(4)顺层岩溶储层与潜山周缘的斜坡背景、先存孔隙和裂缝有关,环潜山周缘呈环带状分布,以洞穴型和裂缝-孔洞型为主,90%以上的溶蚀孔洞及洞穴通过断裂及裂缝相连通。(5)潜山(风化壳)岩溶储层发育于潜山区,与中长期的角度不整合面相关,受断裂和裂缝影响大,准层状分布,峰丘地貌特征明显,根据围岩岩性分为灰岩潜山岩溶储层和白云岩风化壳岩溶储层,灰岩缝洞系统发育、基质孔不发育,白云岩缝洞欠发育,以白云岩晶间溶孔、裂缝为主。(6)受断裂控制岩溶储层主要发育于内幕断裂发育区,缝洞发育埋深大、规模大、跨度长,沿断裂呈栅状分布,以裂缝-孔洞型为主,断裂-洞穴型次之,断裂和裂缝越发育,溶蚀孔洞和洞穴也越发育,单井试油产能更高更稳定。(7)研究区岩溶储层在内幕区大量发育,主要为顺层岩溶储层和受断裂控制岩溶储层,勘探潜力大。

松辽盆地莺山-双城断陷白垩系致密火山岩天然气成藏条件及主控因素

综合地震、包裹体、烃源岩和生产测试等资料,在构造特征、成藏期次和成藏条件分析的基础上,明确了松辽盆地莺山-双城断陷白垩系致密火山岩气藏的分布特征及成藏主控因素。研究结果表明:(1)莺山-双城断陷经历了3期伸展与3期挤压的构造活动,青山口组沉积末期(84~88 Ma)为主成藏期,研究区处于稳定坳陷期,构造活动弱,有利于气藏的形成与保存。(2)研究区火山岩储层以火山碎屑岩、火山熔岩为主,孔隙度和渗透率分别为9.6%和0.93 mD,沙河子组烃源岩的有机质丰度高,TOC(总有机碳含量)和S1+S2(生烃潜量)分别为2.61%和0.62 mg/g,镜质体反射率Ro平均为3.26%,处于过成熟阶段,天然气通过断裂和不整合面向上运移至营一段致密火山岩并富集成藏。(3)莺山-双城断陷天然气成藏受烃源岩、断层、不整合面、火山体等成藏条件及耦合关系控制,断裂差异性活动控制营一段和沙河子组地层发育和叠加,沙河子组烃源岩发育于北部莺山断陷局部,营一段则集中发育于四站—太平庄断裂之间;气藏集中在Ro大于3.0%的高—过成熟烃源岩附近,高产气井围绕生烃中心呈环状分布;靠近通源断裂与不整合面的爆发相、溢流相储层物性好,是区内重要的天然气富集区。(4)研究区内的天然气藏可划分为莺山断陷“下生上储-断体匹配-近源垂向运移”和双城断陷“侧生侧储-断面耦合-远源侧向运聚”2种成藏模式,莺山断陷的构造-岩性气藏是研究区最有利的勘探区。