元坝地区中部珍珠冲段储层裂缝综合预测

Comprehensive prediction of fracture of Zhenzhuchong Formation reservoir  in central of Yuanba Area

 王本强 秦启荣 范存辉 周坤 陶佳丽

西南石油大学资源与环境学院，四川 成都 610500 成都理工大学能源学院，四川 成都 610500）

School of Resources and Environment, Southwest Petroleum University, Chengdu 610500, China College of Energy, Chengdu University of Technology, Chengdu 610500, China)

 为了探明川东北元坝地区中部珍珠冲段砂砾岩储层裂缝的发育特征和分布情况，采用野外露头调查、岩心观测以及成像测井等手段对珍珠冲段储层裂缝进行了研究。结果表明，珍珠冲段储层裂缝以高角度缝为主，裂缝发育的优势方位为近EW向和NWW向，优势方位的裂缝走向与现今最大水平主应力方向大致一致，且高角度缝和直立缝的充填程度较低，说明工区裂缝的有效性较好。综合运用AVAZ裂缝检测技术、构造曲率法和古构造应力场数值模拟法，结合现场生产资料对珍珠冲段储层的裂缝分布进行预测，可知裂缝发育的有利区主要为断鼻构造、多组断裂带的交会部位及断裂转折端。

 In order to ascertain the fracture development characteristics and distribution of Zhenzhuchong Formation glutenite reservoir in the central of Yuanba Area, this paper adopted the technologies of field outcrops investigation, core description and FMI imaging logging to study the fracture of Zhenzhuchong Formation reservoir. Results show that reservoir fractures are mainly of high- angle and vertical fractures and nearly EW and NWW are the predominant directions; the predominant fractures strike is consistent with the orientation of current maximum horizontal principal stress and most of the high-angle and vertical fractures are unfilled, which shows that the fracture effectiveness is high in work area. Meanwhile, comprehensively adopting AVAZ fracture detection technology, tectonic curvature and numerical simulation method for the paleostructure stress field and combining with practical data, we predict the distribution of reservoir fractures. It is known that the favorable areas of the fracture development are faulted nose structures, intersection position of several fault belts and hinge zone.

10.6056/DKYT201306009