摘要
鄂尔多斯盆地中南部延长组长7油层组具有丰富的页岩气资源，利用测井资料准确计算未取心井的页岩气量具有重要意义。首先，利用烃源岩测井响应特征和重叠图法识别长7油层组页岩；其次，利用多元回归法针对页岩建立有机碳含量（TOC）测井解释模型，并结合测井资料计算吸附气量；最后，建立孔隙度解释模型，结合Hossin公式间接计算游离气量。结果表明，研究区长7油层组页岩含气总量为3．09～5．55m3／t，平均值为4．11m3／t；其中吸附气量为2．83～3．77m3／t，平均值为2．97m3／t；游离气量一般为0．07～2．51m3／t，平均值为1．14m3／t。
Chang-7 oil layers of Yanchang formation in central and southern Ordos basin is rich in shale gas,and it is of great importance to precisely calculate the shale gas content in non-coring wells with logging interpretation data.Firstly,by considering the logging characteristics of hydrocarbon source rocks,the overlap method was used to identify the shale of Chang-7 oil layers.Secondly,by multi-linear regression method,the logging interpretation model of organiccarbon content was established and the logging data were used to calculate the volume of adsorbed gas.Finally,by using the established porosity model and Hossin formula,the volume of free gas was indirectly calculated.Study results indicate the total volume of Chang-7 shale gas in the central and southern Ordos basin is 3.09 ~ 5.55m3/t,with the average value of 4.11m3/t,the volume of adsorbed gas is 2.83~3.77m3/t,with the average value of 2.97m3/t,and the volume of free gas is 0.07~2.51m3/t,with the average value of 1.14m3/t.
出处
《石油地质与工程》
CAS
2016年第5期59-62,66,共5页
Petroleum Geology and Engineering
基金
国家"863"项目"页岩气勘探开发新技术"(2013AA064501)
国家大学生创新训练项目"测井页岩气评价"(201410697001)
关键词
鄂尔多斯盆地
页岩气量计算
测井解释模型
有机碳含量
Ordos basin
shale gas content calculation
logging interpretation models
organic carbon content(TOC)
