不同序级走滑断裂对碳酸盐岩储集层发育的控制差异  

Differential Controls of Strike-Slip Faults of Different Orders on Carbonate Reservoirs

作　　者：杜仲元 李相文 李青霖 孙冲[3] 李默涵 张冠卿 但光箭 DU Zhongyuan;LI Xiangwen;LI Qinglin;SUN Chong;LI Mohan;ZHANG Guanqing;DAN Guangjian(BGP Inc.,CNPC,Zhuozhou,Hebei 072751,China;Optical Science and Technology(Chengdu)Ltd.,Chengdu,Sichuan 611730,China;Research Institute of Exploration and Development,Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000)

机构地区：[1]中国石油集团东方地球物理勘探有限责任公司,河北涿州072751 [2]中油奥博(成都)科技有限公司,成都611730 [3]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000

出　　处：《新疆石油地质》2024年第4期425-431,共7页Xinjiang Petroleum Geology

基　　金：中国石油科技项目(2023ZZ16)。

摘　　要：断控岩溶体系储集空间结构差异制约该类油藏高效开发。目前,对高序级走滑断裂储集层储集空间结构研究较深入,但对低序级走滑断裂储集层储集空间结构研究较少。以塔里木盆地北部坳陷富满油田为例,从断裂活动强度、沉积环境、岩性等方面展开分析,对比不同序级走滑断裂储集层储集空间结构成因及差异,并分析了低序级走滑断裂的成因及勘探潜力。高序级走滑断裂活动强烈,储集层在剖面上呈倒三角式破碎,储集层规模由上至下逐渐减小;低序级走滑断裂活动强度相对较弱,储集层在剖面上呈正三角式破碎,储集层规模由上至下逐渐增大。低序级走滑断裂对地层的破碎规模影响有限,密集发育的裂缝网络可以导致储集层大规模破碎,影响储集层发育的主要因素是沉积环境和岩性。富满油田深层低序级走滑断裂由西向东可分为3个区域,勘探潜力大。Differential spatial structures of the fault-controlled karst reservoirs constrain the efficient development of these reservoirs.The pore structure has been substantially studied for high-order strike-slip fault-controlled reservoirs,but rarely for low-order strike-slip faultcontrolled reservoirs.Taking the Fuman oilfield in the northern depression of the Tarim basin as an example,different orders of strike-slip fault-controlled reservoirs were analyzed from the aspects of stress,depositional environment,and lithology,to compare their genesis and differences of pore structure,and the origins and exploration potentials of low-order strike-slip faults were examined.It is found that high-order strike-slip faults underwest strong faulting,resulting in an inverted triangular fracture pattern in the reservoir,with a decreasing scale from top to bottom.In contrast,low-order strike-slip faults experienced relatively weaker tectonic stress,leading to a normal triangular fracture pattern in the reservoir,with an increasing scale from top to bottom.The fracturing scale induced by low-order strike-slip faults is limited;however,a densely developed fracture network can lead to extensive reservoir fracturing.The primary factors influencing reservoir development are the depositional environment and lithology.The deep-seated low-order strike-slip faults in the Fuman oilfield can be divided into three zones from west to east,showing significant exploration potential.

关 键 词：富满油田 走滑断裂 高序级 低序级 储集层 储集空间 勘探潜力 

分 类 号：TE122.1[石油与天然气工程—油气勘探]