鄂尔多斯盆地马岭油田长7致密储层古今构造应力研究  

STUDY ON PALEO-TECTONIC AND PRESENT TECTONIC STRESS IN CHANG 7 TIGHT RESERVOIR OF MALING OILFIELD,ORDOS BASIN

作　　者：赵继勇[1,2] 周新桂 雷启鸿[1,2] 赵国玺[1,2] 何右安[1,2] 时建超[1,2] 张林炎[4] ZHAO Jiyong;ZHOU Xingui;LEI Qihong;ZHAO Guoxi;HE You-an;SHI Jianchao;ZHANG Linyan(Research Institute of Exploration and Development, PetroChina Changqing Oilfield Company, Xi’ an 710018, Shannxi, China;National Engineering Laboratory for Exploration and Development of Low-permeability Oil and Gas Fields, Xi’ an 710018, Shannxi, China;Oil & Gas Survey, China Geological Survey, Beijing 100029, China;Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China)

机构地区：[1]中国石油长庆油田分公司勘探开发研究院,陕西西安710018 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710018 [3]中国地质调查局油气资源调查中心,北京100029 [4]中国地质科学院地质力学研究所,北京100081

出　　处：《地质力学学报》2017年第6期810-820,共11页Journal of Geomechanics

基　　金：国家重大科技专项(2017ZX05069003);中石油股份公司重大科技专项(2016E-0505)

摘　　要：构造应力是油气运移与富集的控制因素之一,古今构造应力状态的研究对油气勘探与开发具有重要意义。利用流体包裹体测温、古地磁裂缝定向、声发射法和微地震监测、岩石压缩试验和水力压裂法分别对鄂尔多斯盆地马岭油田长7致密储层古今构造应力进行研究。结果表明:长7致密储层裂缝发育关键期为燕山运动Ⅳ幕,其水平最大主应力方向为84°,有效应力大小为44 MPa;现今水平最大主应力方向为76°,而现今水平最小主应力有效应力大小为15 MPa。Tectonic stress is one of the controlling factors of hydrocarbon migration and accumulation.The study of stress state on paleo-tectonic and present tectonic is of great significance to the exploration and development of oil and gas.Temperature measurement of fluid inclusion,paleomagnetic fracture orientation,acoustic emission method,microseismic monitoring,rock compression experiment and hydraulic fracturing method are applied respectively to the study of paleo-tectonic and present tectonic stress in the Chang7tight reservoir of Maling oilfield in Ordos Basin.The results show that the crucial period of fracture formation in the Chang7tight reservoir is the IV stage of the Yanshan movement,with the horizontal maximum principal stress direction of84°and effective stress44MPa,while the current horizontal maximum principal stress direction is76°and the current effective stress of minimum principal stress is15MPa.

关 键 词：马岭油田 长7致密储层 裂缝发育期 古构造应力 现今构造应力 

分 类 号：P618.13[天文地球—矿床学]