东濮凹陷马厂油田断裂内部结构特征对油气成藏的意义

Effect of internal structure characteristics of fracture on hydrocarbon accumulation
 in Machang Oilfield of Dongpu Depression

徐田武¹ 张光斌¹ 张琛琛¹ 董瑞锋¹ 徐本燕¹ 李静²

中国石化中原油田分公司勘探开发科学研究院，河南 濮阳 457001 中国石化集团中原石油勘探局公共事业管理处，河南 濮阳 457001

Research Institute of Exploration and Development, Zhongyuan Oilfield Company, SINOPEC, Puyang 457001, China Public Affairs Management Office, Zhongyuan Petroleum Exploration Bureau, SINOPEC, Puyang 457001, China

通过大量测井及录井资料分析，马厂油田内的马厂断裂、马东断裂均存在3分性，可分为上部诱导裂缝带、中间封闭分隔带及下部诱导裂缝带。上部诱导裂缝带的裂缝发育规模大，对油气的垂向输导作用较强，不易造成油气的封堵；中间封闭分隔带通常由颗粒较细的断层泥（软泥岩）组成，其排驱压力大，封闭性较强，可以阻挡油气的侧向运移；下部诱导裂缝带裂缝相对较发育，可作为油气的主要储层。由于马厂断裂的3分性，导致来自石炭—二叠煤系烃源岩生成的气主要富集在马厂断裂的上升盘；马东断裂的3分性，导致来自葛岗集洼陷的油气主要富集在马东断裂的次级西倾断裂的上升盘。

Through a lot of logging and logging data analysises. Machang and Madong fractures can be divided into 3 parts, which are sequentially upper induced fracture zone, middle closed zone and lower induced fracture zone. The scale of upper induced fracture zone is large, with a strong vertical conduit for hydrocarbon, and it is not easy to cause accumulation of hydrocarbon; The middle closed zone is usually composed of more fine grain gouges (soft mudstones) and its expulsion pressure and strong sealing can block the lateral migration of oil and gas; The lower induced fracture zone with cracks is relatively well developed and can be used as the main reservoirs of hydrocarbon. The three parts of Machang fractures can result in the gases generated from Carboniferous -Permian coal measures source rocks mainly enriching in the upthrown side of Machang fracture. The three parts of Madong fracture can result in the oils and gases generated from Hegangji Sag mainly enriching in the upthrown side of secondary west-dip fracture in Machang fracture.

10.6056/dkyqt201206003