川西海相雷四上亚段溶蚀储集层录井随钻评价技术  

Mud logging while drilling evaluation technology for dissolution reservoirs in the upper part of the fourth member of Leikoupo formation of marine facies in Western Sichuan

作　　者：袁艳丽 Yuan Yanli

机构地区：[1]中石化西南石油工程有限公司地质录井分公司

出　　处：《录井工程》2019年第3期106-111,188,189,共8页Mud Logging Engineering

基　　金：中石化科技部项目“川西海相岩溶储层录井精细评价方法研究”(编号:JP18036)

摘　　要：川西海相雷四上亚段溶蚀储集层取得了天然气勘探开发的重大突破,但因储集层特征复杂,主要依靠钻后测井或实验分析获取孔渗性,难以随钻准确识别并评价储集层。为此,通过优选工程和录井参数进行统计分析形成元素识别方法,在快速识别储集层的基础上,针对工区特点改进了机械比能指数计算模型,建立了随钻评价方法与随钻评价标准。井场试验表明,新的录井随钻评价方法与钻后的测井解释结论、测试结果较为吻合,可为该气藏的取心卡层完井作业与测试选层提供可靠依据。A major breakthrough has been made in the exploration and development of natural gas in the dissolution reservoir of the upper part of the fourth member of Leikoupo formation of marine facies in Western Sichuan.However,because of the complex reservoir characteristics,it is difficult to accurately identify and evaluate reservoirs while drilling because of the pore character and permeability obtained mainly by post-drilling logging or experimental analysis.Therefore,element identification method was formed by optimizing engineering and mud logging parameters through statistical analysis.On the basis of fast reservoir identification,the calculation model of mechanical specific energy index was improved according to the characteristics of the work area,and the evaluation method while drilling and the evaluation standard while drilling ware established.The wellsite test shows that the new mud logging while drilling evaluation method is in good agreement with the logging interpretation conclusion and test results after drilling,which can provide reliable basis for the completion job and test pay zone selection of the gas reservoir.

关 键 词：川西 雷四上亚段 溶蚀储集层 元素录井 工程录井 随钻评价 

分 类 号：TE132.1[石油与天然气工程—油气勘探]