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页岩横向各向同性地应力预测模型中弹性参数的确定方法
(1.油气资源与探测国家重点实验室(中国石油大学(北京)), 北京 102249;2.中国石油大学(北京)地球科学学院, 北京 102249;3.中国石化江汉油田分公司, 湖北 潜江 433124;4.中国石化江汉油田分公司勘探开发研究院, 湖北 武汉 430223)
METHOD FOR DETERMINING ELASTIC PARAMETERS FOR THE PREDICTION MODEL OF SHALE TRANSVERSELY ISOTROPIC GEOSTRESS
(1.State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;2.College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China;3.Jianghan Oilfield Company, SINOPEC, Qianjiang 433124, Hubei, China;4.Research Institute of Petroleum Exploration and Development, Jianghan Oilfield Company, SINOPEC, Wuhan 430223, Hubei, China)
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投稿时间:2018-05-20    修订日期:2018-06-30
中文摘要: 水力压裂是页岩气开采的重要方式,地应力分布是页岩水力压裂的地质依据。基于横向各向同性模型进行测井地应力计算时需要首先确定C11C33C44C66C13五个弹性参数,其中C11C13利用测井资料无法直接获得,需要通过预测模型进行估算。利用四川盆地东南部龙马溪组页岩实测超声波资料,建立了五种弹性参数的预测模型,根据模型中是否应用斯通利波将其分为两类,一类是有斯通利波资料的ANNIE、MANNIE1和MANNIE2模型;另一类为缺少斯通利波资料的MANNIE3和V-reg模型。对比不同模型的预测效果,结果表明:第一类模型中MANNIE1模型确定的弹性参数与实测值偏差小,效果最好;第二类模型中V-reg模型的预测效果优于MANNIE3模型。两类模型相比,缺少斯通利波模型的预测效果稍差,但可以同时预测C11C66C13,在实际应用过程中具有更大的适用范围。利用V-reg模型确定的弹性参数在焦石坝地区测井地应力计算中进行应用,计算的地应力值与实测值误差小于10%,能够更准确的反映实际地层情况。
中文关键词: 页岩  地应力  各向异性模型  弹性参数
Abstract:The distribution of geostress constitutes the geological basis for shale hydraulic fracturing, which is an important way of shale gas exploitation. The calculation of shale geostress based on the transversely isotropic model needs to obtain five elastic parameters C11, C33, C44, C66, and C13, among which C11 and C13 can not be obtained directly from the logging data, and prediction models need to be established for the estimation. Based on the measured ultrasonic data of the Longmaxi Formation shale in the southeast of the Sichuan Basin, five kinds of prediction models for elastic parameters were established. They could be divided into two types by whether or not the Stoneley wave are used. Type Ⅰ is the ANNIE, MANNIE1 and MANNIE2 models with Stoneley wave, and type Ⅱ is the MANNIE3 and V-reg models which lack for Stoneley wave. The rationalities of stiffness tensors predicted by different models were compared and evaluated. Among these models, model MANNIE1 has the smallest deviation and the best effect in type Ⅰ models. Elastic parameter calculated by V-reg model makes more deviation compared to MANNIE1, but type Ⅱ models has wider range of application to get all three parameters C11, C66 and C13. The elastic parameters determined by V-reg model are applied in the calculation of geostress in Jiaoshiba area. The error between calculated gestress and measured value is less than 10%, which can reflects the actual formation more accurately.
文章编号:     中图分类号:P618.13;P631.8    文献标志码:
基金项目:国家自然科学基金委员会—中石化联合基金(U1663203)
引用文本:
田鹤,曾联波,舒志国,包汉勇,徐翔,毛哲,王小垚.页岩横向各向同性地应力预测模型中弹性参数的确定方法[J].地质力学学报,2019,25(2):166-176DOI:10.12090/j.issn.1006-6616.2019.25.02.015
TIAN He,ZENG Lianbo,SHU Zhiguo,BAO Hanyong,XU Xiang,MAO Zhe,WANG Xiaoyao.METHOD FOR DETERMINING ELASTIC PARAMETERS FOR THE PREDICTION MODEL OF SHALE TRANSVERSELY ISOTROPIC GEOSTRESS[J].,2019,25(2):166-176DOI:10.12090/j.issn.1006-6616.2019.25.02.015

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