宝北区块构造应力场模拟及裂缝预测  

Simulation of tectonic stress field and fracture prediction in Baobei block

作　　者：王红坤 马家虎[2] 梁杰锋 王海涛[3] 张云[1] 杨瑞莎 WANG Hongkun;MA Jiahu;LIANG Jiefeng;WANG Haitao;ZHANG Yun;YANG Ruisha(Exploration&Development Research Institute of Henan Oilfield Company,SINOPEC,Zhengzhou,Henan 450018,China;Exploration and Development Technology Research Center of Yanchang Oilfield Co.,Ltd.,Yan'an,Shaanxi 716000,China;Research Institute of Petroleum Exploration and Development,SINOPEC,Beijing 100083,China)

机构地区：[1]中国石化河南油田分公司勘探开发研究院,河南郑州450018 [2]延长油田股份有限公司勘探开发研究中心,陕西延安716000 [3]中国石化勘探开发研究院,北京100083

出　　处：《石油地质与工程》2022年第1期50-56,共7页Petroleum Geology and Engineering

基　　金：国家自然科学基金“核磁共振技术研究裂缝性致密油藏注二氧化碳提高采收率机理”(51504283)。

摘　　要：以焉耆盆地博湖坳陷宝北区块为例,对由冲起构造模式控制的致密砂岩储层的裂缝发育特征进行系统研究,并在此基础上,对古应力场进行模拟,进而对研究区裂缝发育区进行预测。结果表明:宝北区块致密砂岩储层中裂缝发育,主要为天然构造缝,包括剪切裂缝、张性裂缝和挤压裂缝。采用三维有限元法进行精细地质建模和古构造应力场模拟,恢复了目的层在冲起构造模式下的古应力场,通过综合破裂率定量预测了裂缝的发育程度。裂缝预测结果与实际地质情况一致,为宝北油藏开发调整提供了可靠的基础地质资料,同时,为此类致密砂岩裂缝型储层甜点的有效预测提供了可行的方法。Taking Baobei block of Bohu depression in Yanqi Basin as an example,the fracture development characteristics of tight sandstone reservoir controlled by thrust structure model are systematically studied.On this basis,the paleo-stress field is simulated,and then the fracture development area in the study area is predicted.The results show that the fractures in the tight sandstone reservoir of Baobei block are developed,mainly natural structural fractures,including shear fractures,tensile fractures and compression fractures.Fine geological modeling and paleotectonic stress field simulation are carried out by 3D finite element method,the paleo stress field of the target layer under the thrust structure mode is restored,and the development degree of fractures is quantitatively predicted by comprehensive fracture rate.The fracture prediction results are consistent with the actual geological conditions,which provides reliable basic geological data for the development and adjustment of Baobei reservoir.Meantime,it provides a feasible method for the effective prediction of this kind of tight sandstone fractured reservoir.

关 键 词：宝北区块 致密砂岩 应力场模拟 裂缝预测 

分 类 号：TE111.2[石油与天然气工程—油气勘探]