反射波成像与纵波径向速度成像在华北油田裂缝型碳酸盐岩储层勘探开发中的联合应用  

The combined application of reflective wave imaging and P-wave velocity variation to the exploration and development of fractured carbonate reservoirs of North China Oilfield

作　　者：马修刚 周军 蔡文渊 王伟[1] 于伟高 曹先军 孙佩 MA Xiu-Gang;ZHOU Jun;CAI Wen-Yuan;WANG Wei;YU Wei-Gao;CAO Xian-Jun;SUN Pei(Technology Center,China Petroleum Logging Co.Ltd.,Xi'an 710077,China;North China Branch,China Petroleum Logging Co.Ltd.,Renqiu062550,China;North China Oilfield Branch,China Petroleum and Natural Gas Co.Ltd.,Renqiu 062550,China)

机构地区：[1]中国石油集团测井有限公司技术中心,陕西西安710077 [2]中国石油集团测井有限公司华北分公司,河北任丘062550 [3]中国石油天然气股份有限公司华北油田分公司,河北任丘062550

出　　处：《物探与化探》2020年第2期271-277,共7页Geophysical and Geochemical Exploration

基　　金：国家重点研发计划项目(2018YFC0603600-005);中国石油天然气股份有限公司重大科技专项项目(2017E-15);中国石油集团公司工程专项(2018E-2107)。

摘　　要：碳酸盐岩地层因成藏复杂,缝洞储层非均质性强、常规测井响应特征不明显,给勘探和有效开发带来较大难度。缝洞型储层有效性评价是深层油气勘探开发中面临的主要难题。对于储层中尺度较小的裂缝,由于地震的分辨率较低,常规测井方法探测深度较浅,难以对数十米地质构造进行准确评价。近年来发展起来的单井偶极横波反射成像技术能够有效利用低频横波的传播特点,对井旁20~30 m范围内的声反射体进行成像。纵波径向速度成像技术利用多接收阵列反演井壁1 m以内的纵波速度变化,能较好地指示储层的可改造性。偶极横波反射成像较好地发现井壁裂缝延伸以及井旁裂缝,纵波径向速度成像可反映井壁附近储层纵波速度变化,综合认为裂缝较发育,延伸较远或存在井旁隐蔽裂缝储层且井壁纵波径向速度变化较大的层段,具有较好的储层改造潜力。应用该方法对华北油田河西务潜山几口井进行处理分析,分析结果与储层改造后产液有较好的对应性,值得进一步推广应用。Because of complex reservoir forming conditions,strong heterogeneity and indistinct regularity of conventional logging response,it’s difficult to conduct exploration effectively in the carbonate reservoir.The effectiveness evaluation of fractured reservoir is the main problem in the exploration and development of deep oil and gas.Seismic survey is limited to identitying small scale fractures or faults because of low resolution,and it is difficult for conventional logging method to accurately evaluate the geological characteristics because of the shallow investigation depth.The dipole shear wave imaging technique has been developed in recent years,which can image borehole acoustic reflectors within the range of 20~30 m based on low frequency of dipole shear wave.Monopole radial profiling of compressional slowness can be used to retrieve P-wave velocity variation in well bore within 1 m,which can indicate the reversibility of the reservoir.The dipole shear wave imaging is a good way for finding the extension of the wellbore fractures and the concealed fractures near the well,and monopole radial profiling of compressional slowness can reflect the change of P-wave velocity near the wellbore.In a comprehensive way,the reservoir with such characteristics as well developed fractures,long extension of fractures or existence of concealed fractures near the well bore and remarkable variation of compressional slowness indicates great potential for reservoir reconstruction.This method was applied to processing several wells in Hexiwu Qianshan in Huabei Oilfield,and the results correspond well with the results of liquid production after the reservoir reconstruction,and hence the method is worthy of further popularization and application.

关 键 词：裂缝型碳酸盐岩 缝洞型储层偶极横波反射 纵波径向速度 储层改造 

分 类 号：P631.4[天文地球—地质矿产勘探]