To address the issues for assessing and prospecting the replaceable resource of crisis mines, a geological ore-controlling field model and a mineralization distribution field model were proposed from the viewpoint of ...To address the issues for assessing and prospecting the replaceable resource of crisis mines, a geological ore-controlling field model and a mineralization distribution field model were proposed from the viewpoint of field analysis. By dint of solving the field models through transferring the continuous models into the discrete ones, the relationship between the geological ore-controlling effect field and the mineralization distribution field was analyzed, and the quantitative and located parameters were extracted for describing the geological factors controlling mineralization enrichment. The method was applied to the 3-dimensional localization and quantitative prediction for concealed ore bodies in the depths and margins of the Daehang mine in Guangxi, China, and the 3-dimensional distribution models of mineralization indexes and ore-controlling factors such as magmatic rocks, strata, faults, lithology and folds were built. With the methods of statistical analysis and the non-linear programming, the quantitative index set of the geological ore-controlling factors was obtained. In addition, the stereoscopic located and quantitative prediction models were set up by exploring the relationship between the mineralization indexes and the geological ore-controlling factors. So far, some concealed ore bodies with the resource volume of a medium-sized mineral deposit are found in the deep parts of the Dachang Mine by means of the deep prospecting drills following the prediction results, from which the effectiveness of the predication models and results is proved.展开更多
In the second member of the Upper Triassic Xujiahe Formation(T_(3)x_(2))in the Xinchang area,western Sichuan Basin,only a low percent of reserves has been recovered,and the geological model of gas reservoir sweet spot...In the second member of the Upper Triassic Xujiahe Formation(T_(3)x_(2))in the Xinchang area,western Sichuan Basin,only a low percent of reserves has been recovered,and the geological model of gas reservoir sweet spot remains unclear.Based on a large number of core,field outcrop,test and logging-seismic data,the T_(3)x_(2) gas reservoir in the Xinchang area is examined.The concept of fault-fold-fracture body(FFFB)is proposed,and its types are recognized.The main factors controlling fracture development are identified,and the geological models of FFFB are established.FFFB refers to faults,folds and associated fractures reservoirs.According to the characteristics and genesis,FFFBs can be divided into three types:fault-fracture body,fold-fracture body,and fault-fold body.In the hanging wall of the fault,the closer to the fault,the more developed the effective fractures;the greater the fold amplitude and the closer to the fold hinge plane,the more developed the effective fractures.Two types of geological models of FFFB are established:fault-fold fracture,and matrix storage and permeability.The former can be divided into two subtypes:network fracture,and single structural fracture,and the later can be divided into three subtypes:bedding fracture,low permeability pore,and extremely low permeability pore.The process for evaluating favorable FFFB zones was formed to define favorable development targets and support the well deployment for purpose of high production.The study results provide a reference for the exploration and development of deep tight sandstone oil and gas reservoirs in China.展开更多
气井射孔位置关系到天然气开采过程中流体是否可以顺利流出,也是直接影响油气井产量的重要因素。为使气井位置满足油气开采要求,本文提出基于地层特征重构算法的气井射孔位置回归优化方法。该方法利用MAS(Full Name of MAS Management S...气井射孔位置关系到天然气开采过程中流体是否可以顺利流出,也是直接影响油气井产量的重要因素。为使气井位置满足油气开采要求,本文提出基于地层特征重构算法的气井射孔位置回归优化方法。该方法利用MAS(Full Name of MAS Management System)地质三维建模软件,通过定义地质单元体,以及生成地质单元体后得到的气井射孔位置地层特征和相关数据,依据该数据建立气井射孔位置回归模型,通过该模型描述气井射孔位置与实际位置的偏差关系,再使用遗传蚁群混合算法对气井射孔位置回归模型实施优化求解,实现气井射孔位置回归优化。实验结果表明:该方法可有效重构气井射孔位置地层特征,并可对气井射孔位置进行优化,优化后气井位置偏差量较小,具备较强的应用性。展开更多
THE Songxi Ag-Sb ore deposit is situated 28 km northeast of Meizhou city in Guangdong. It is on thenorth edge of the volcanic fault depression of the Saigangshang, which belongs to the upper Palaeozoicfault basin belt...THE Songxi Ag-Sb ore deposit is situated 28 km northeast of Meizhou city in Guangdong. It is on thenorth edge of the volcanic fault depression of the Saigangshang, which belongs to the upper Palaeozoicfault basin belt of Yong’an-Meizhou, and at the intersection of Dadong-Guidong-Jiaoling EW fault zone,Lianhuashan-Heyuan NE fault zone and Jiaoling-Shantou NW fault zone. Ag-Sb ore body occurs at thebottom of the upper part of the lower Jurassic Jingji Group (J<sub>lje-l</sub>), which is a formation of detrital rocksconsisting mainly of carbonaceous shale. 1 Geological characteristics of the ore展开更多
基金Project(2007CB416608) supported by the National Basic Research Program of ChinaProject(2006BAB01B07) supported by the National Science and Technology Pillar Program during the 11th Five-Year Plan Period
文摘To address the issues for assessing and prospecting the replaceable resource of crisis mines, a geological ore-controlling field model and a mineralization distribution field model were proposed from the viewpoint of field analysis. By dint of solving the field models through transferring the continuous models into the discrete ones, the relationship between the geological ore-controlling effect field and the mineralization distribution field was analyzed, and the quantitative and located parameters were extracted for describing the geological factors controlling mineralization enrichment. The method was applied to the 3-dimensional localization and quantitative prediction for concealed ore bodies in the depths and margins of the Daehang mine in Guangxi, China, and the 3-dimensional distribution models of mineralization indexes and ore-controlling factors such as magmatic rocks, strata, faults, lithology and folds were built. With the methods of statistical analysis and the non-linear programming, the quantitative index set of the geological ore-controlling factors was obtained. In addition, the stereoscopic located and quantitative prediction models were set up by exploring the relationship between the mineralization indexes and the geological ore-controlling factors. So far, some concealed ore bodies with the resource volume of a medium-sized mineral deposit are found in the deep parts of the Dachang Mine by means of the deep prospecting drills following the prediction results, from which the effectiveness of the predication models and results is proved.
基金Supported by the Sinopec Science and Technology Project(P21040-1).
文摘In the second member of the Upper Triassic Xujiahe Formation(T_(3)x_(2))in the Xinchang area,western Sichuan Basin,only a low percent of reserves has been recovered,and the geological model of gas reservoir sweet spot remains unclear.Based on a large number of core,field outcrop,test and logging-seismic data,the T_(3)x_(2) gas reservoir in the Xinchang area is examined.The concept of fault-fold-fracture body(FFFB)is proposed,and its types are recognized.The main factors controlling fracture development are identified,and the geological models of FFFB are established.FFFB refers to faults,folds and associated fractures reservoirs.According to the characteristics and genesis,FFFBs can be divided into three types:fault-fracture body,fold-fracture body,and fault-fold body.In the hanging wall of the fault,the closer to the fault,the more developed the effective fractures;the greater the fold amplitude and the closer to the fold hinge plane,the more developed the effective fractures.Two types of geological models of FFFB are established:fault-fold fracture,and matrix storage and permeability.The former can be divided into two subtypes:network fracture,and single structural fracture,and the later can be divided into three subtypes:bedding fracture,low permeability pore,and extremely low permeability pore.The process for evaluating favorable FFFB zones was formed to define favorable development targets and support the well deployment for purpose of high production.The study results provide a reference for the exploration and development of deep tight sandstone oil and gas reservoirs in China.
文摘气井射孔位置关系到天然气开采过程中流体是否可以顺利流出,也是直接影响油气井产量的重要因素。为使气井位置满足油气开采要求,本文提出基于地层特征重构算法的气井射孔位置回归优化方法。该方法利用MAS(Full Name of MAS Management System)地质三维建模软件,通过定义地质单元体,以及生成地质单元体后得到的气井射孔位置地层特征和相关数据,依据该数据建立气井射孔位置回归模型,通过该模型描述气井射孔位置与实际位置的偏差关系,再使用遗传蚁群混合算法对气井射孔位置回归模型实施优化求解,实现气井射孔位置回归优化。实验结果表明:该方法可有效重构气井射孔位置地层特征,并可对气井射孔位置进行优化,优化后气井位置偏差量较小,具备较强的应用性。
文摘THE Songxi Ag-Sb ore deposit is situated 28 km northeast of Meizhou city in Guangdong. It is on thenorth edge of the volcanic fault depression of the Saigangshang, which belongs to the upper Palaeozoicfault basin belt of Yong’an-Meizhou, and at the intersection of Dadong-Guidong-Jiaoling EW fault zone,Lianhuashan-Heyuan NE fault zone and Jiaoling-Shantou NW fault zone. Ag-Sb ore body occurs at thebottom of the upper part of the lower Jurassic Jingji Group (J<sub>lje-l</sub>), which is a formation of detrital rocksconsisting mainly of carbonaceous shale. 1 Geological characteristics of the ore
