利用测录井资料预测地层坍塌压力的方法及应用  

Method and Application of Predicting Formation Collapse Pressure Using Logging Data

作　　者：汪国富 WANG Guofu(Jianghan Logging Company,Sinopec Matrix Corporation,Wuhan,Hubei 430074,China)

机构地区：[1]中石化经纬有限公司江汉测录井分公司,湖北武汉430074

出　　处：《江汉石油职工大学学报》2024年第3期36-38,共3页Journal of Jianghan Petroleum University of Staff and Workers

基　　金：中石化石油工程公司科技项目“复兴页岩油气定测录导工艺及解释技术研究”(SG2102-13K)。

摘　　要：为了提高泥页岩地层坍塌压力的预测精度和方法的适用性,提出了利用地层孔隙流体压力梯度、地层岩性密度、地层泥质含量和钻井液体系影响系数等参数计算地层坍塌压力梯度的数学模型。该方法在江汉油田、涪陵页岩气田、鄂西地区红星区块应用160口井,利用该方法在钻前依据邻井预测的地层坍塌压力、地层坍塌压力梯度配置钻井液,规避井壁崩塌、垮塌和坍塌复杂,总有效率在85.0%以上。In order to improve the prediction accuracy of collapse pressure in mud shale formations and the applicability of methods,a mathematical model utilizing parameters such as the pressure gradient of formation pore fluid,formation lithology density,formation mud content,and the coefficient of influence of drilling fluid system is proposed to calculate the collapse pressure gradient of formations.This method has been applied to 160 wells in the Jianghan Oilfield,Fuling Shale Gas Field,and Hongxing Block in the western part of Hubei province.By using this method to predict the formation collapse pressure and formation collapse pressure gradient based on data of offset wells before drilling,drilling fluids can be mixed to avoid complexities such as wellbore collapse and cave-ins,with a total effective rate of over 85.0%.

关 键 词：泥(页)岩 坍塌压力 预测模型 工程应用 

分 类 号：P631[天文地球—地质矿产勘探]