塔里木盆地顺北1号断裂带奥陶系碳酸盐岩储层结构表征及三维地质建模  

Architecture characterization and 3D geological modeling of Ordovician carbonate reservoirs in Shunbei No.1 fault zone,Tarim Basin

作　　者：陈叔阳[1] 何云峰 王立鑫 尚浩杰 杨昕睿 尹艳树[2] CHEN Shuyang;HE Yunfeng;WANG Lixin;SHANG Haojie;YANG Xinrui;YIN Yanshu(Sinopec Northwest Oilfield Company,Urumqi 830000,China;Key Laboratory of Exploration Technologies for Oil and Gas Resources,Ministry of Education,Yangtze University,Wuhan 430100,China)

机构地区：[1]中国石油化工股份有限公司西北油田分公司,乌鲁木齐830000 [2]长江大学油气资源与勘探技术教育部重点实验室,武汉430100

出　　处：《岩性油气藏》2024年第2期124-135,共12页Lithologic Reservoirs

基　　金：国家自然科学基金项目“多点地质统计学相控地震同时反演方法”(编号:41872138)资助。

摘　　要：综合利用地震、测井、岩心以及动态生产资料,对塔里木盆地顺北1号断裂带断控型碳酸盐岩储集体的内部结构进行了层级划分;基于层级划分,通过地震资料属性提取与转换、深度学习、基于目标示性点过程模拟以及离散裂缝网络模拟(DFN)等方法建立了三维地质模型,并以模型进行油气储量和油藏数值模拟,将拟合结果与实际生产数据进行对比。研究结果表明:(1)顺北1号断裂带奥陶系断控型储层按层级由大到小分为走滑断裂影响带、断控体、类洞穴、类洞穴内簇充填和裂缝带共5个层级。(2)走滑断裂影响带受应力差异影响具有分段性,可细分为挤压段、拉分段和平移段;断控体在拉分段发育断裂交会型、单支走滑型,在平移段发育双断裂交错型和两断裂交会型,在挤压段发育双断裂扭曲型和双断裂交会型,共有6种平面组合样式;类洞穴在地震剖面上呈串珠状反射特征;类洞穴内部分为栅体与栅间(基岩),其中栅体又可进一步分为簇(角砾带)、簇间(裂缝带),整体表现为栅状结构,簇的物性更好;裂缝带为类洞穴的主要储集空间,在簇内部比簇间更发育,在一间房组比鹰山组更发育,一间房组和鹰山组均以发育高角度裂缝为主,在两者连接处则以发育水平缝为主。(3)地质模型预测的油气储量与地质分析储量误差为1.75%,模型模拟的生产井地层压力及累产液结果与生产动态吻合度较高,拟合误差小于10%。Based on the seismic,logging,core and dynamic data,the internal architecture of fault-controlled carbonate reservoirs in Shunbei No.1 fault zone of Tarim Basin was divided.Based on the hierarchical division,a 3D geological model was established through seismic data attribute extraction and conversion,deep learning,target-based schematic point process simulation,and discrete fracture network simulation(DFN).Numerical simulation of oil and gas reserves and reservoirs was carried out with the model,and the fitting results were com-pared with the actual production data.The results show that:(1)The Ordovician fault-controlled reservoirs in the study area were categorized into five levels,from large to small,including strike-slip fault-influenced zones,fault-controlled bodies,cave-like,intra-cave-like cluster-filling and fracture zones.(2)The strike-slip faultinfluenced zones has segmentation due to stress differences,which can be subdivided into extrusion section,pullout section and translation section.The fault-control bodies develop six kinds of planar combination styles,including fault intersection type and single-branch slip type in the pullout section,double-fault staggered type and double-fault intersection type in the translation section,and double-fault twisted type and double-fault inter-section type in the extrusion section.The cave-like is characterized by bead-like reflections on the seismic sec-tion.The intra-cave-like is divided into fenestration and inter-fenestration(bedrock),and the fenestration can be further divided into clusters(breccia zones)and inter-clusters(fracture zones),and the whole is characterized by fenestration structure,with better physical properties of the clusters.The fracture zones are the main reservoir space for cave-like structures,which are more developed within clusters than between clusters,and more devel-oped in Yijianfang Formation than in Yingshan Formation.High-angle fractures are mainly developed in Yijian-fang Formation and Yingshan Formation,while horizontal fractures

关 键 词：走滑断裂带 断控体 类洞穴 碳酸盐岩储层 三维地质建模 深度学习 奥陶系 顺北1号断裂带 塔里木盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探] P618.13[天文地球—矿床学]