摘要
泌阳凹陷为中国东部新生代典型富油凹陷,古近系核桃园组沉积了富含有机质湖相泥页岩,前期研究表明,泌阳凹陷深凹区核桃园组具备形成陆相页岩油的有利条件。两年多来,通过开展泌阳凹陷陆相页岩油地质评价和综合研究,形成了包括地质多参数综合评价、岩石学分析、测井储层评价、录井储层评价、地球物理储层预测、资源评价、有利目标评价、水平井优化设计等8项关键技术的地质评价技术系列,其中资源评价及有利区评价技术为页岩油气地质评价最为关键的技术。通过含油气页岩层厚度、面积及含油气量等资源评价关键参数研究,利用体积法计算泌阳凹陷主力页岩层页岩油资源量4.2253×108 t,页岩气资源量729×108 m3。利用有机碳、热演化程度、孔隙度、渗透率等6项页岩油评价指标,结合泌阳凹陷勘探实践,初步建立了泌阳凹陷陆相页岩油有利区评价标准。
Biyang depression is a typical Cenozoic oil enriched depression in the east of China and Paleogene Hetaoyuan formation deposited lacustrine shale containing rich organic matter.Previous studies show Hetaoyuan formation in the deep depressed zone of Biyang depression is of favorable conditions for terrestrial shale oil.For the past two years,comprehensive research and geological evaluation of terrestrial oil in Biyang depression have been carried out.There are a series of geological evaluation technologies on 8 key items,such as multi-parameter geological evaluation,petrological analysis,logging reservoir evaluation,reservoir evaluation logging,geophysical reservoir prediction,resource evaluation,favorable target evaluation,and optimized design on horizontal wells.Among them,the resource evaluation and favorable area evaluation technology for the shale oil and gas geological evaluation are the most critical technologies.Through key parameters research on shale hydrocarbon thickness,are and hydrocarbon-bearing resources,by use of volumetric method,the shale oil resource of main shale layers is up to 4.2253×108t,shale gas resource is up to 729×108 m3.Six evaluation indicators,such as organic carbon,thermal evolution,porosity,permeability and etc have been utilized to initially establish the evaluation criteria for continental shale oil favorable area in Biyang depression.Through optimization of horizontal wells deployment,high oil flow has been achieved after fracturing,which was a major breakthrough for continental shale oil exploration in China.
出处
《石油地质与工程》
CAS
2015年第5期38-41,45,共5页
Petroleum Geology and Engineering
关键词
泌阳凹陷
陆相页岩油
地质评价技术
资源评价
有利区评价
Biyang Depression
terrestrial shale oil
geologic evaluation techniques
resource assessment
favorable area evaluation