【作者】 张贤辉；

【导师】 夏宏泉； 赵军；

【作者基本信息】 西南石油学院 ， 地球探测与信息技术， 2002， 硕士

【摘要】 随着石油工业的发展，水平井钻井技术作为提高单井产量的有效手段之一在全世界得到了越来越广泛的应用。研究和应用水平井钻井的测井地质导向技术是确保水平井成功开发油藏的一项十分重要的工程技术。 研究认为，在做好水平井地质设计和钻井设计的基础上，要实现测井地质导向，必须充分利用随钻测量、随钻测井和录井等资料，开展实时岩性识别、随钻测井解释和地层评价、目标层测井地质特征的建立、导向标志层的选取及模拟曲线对比等方面的工作来确定钻头上行下行钻进方向及在目标层中的位置，以实时调整井眼轨迹，使其尽可能在储层物性较好的部位延伸。 岩性的实时识别能为水平井钻井的测井地质导向提供可靠的岩性依据。从测井相识别的角度出发，在曲线自动分层取值的基础上，从随钻资料中提取与岩性密切相关的参数建立测井相-岩相模式，采用灰色关联分析法实时识别钻井地质剖面的岩性。 在水平井的钻井过程中，要做到实时监督和调整井眼轨迹，需从已钻邻井的各种测井资料及其解释结果中归纳总结出目标层的测井地质特征，作为比较参照模式，同时建立一些地质导向参数的预测模型，由此模型构造相应的模拟曲线与实测曲线对比，判断钻头是否钻遇要求的地质目标层。 在上述一系列方法研究的基础上，结合新疆莫北油田的实际情况研制了一套基于随钻资料的水平井钻井的测井地质导向软件系统。将该软件系统应用于研究工区MBHW04井、MBHW02井和MBHW01井三口水平井的钻井实施中，为水平井钻井提供了合理可行的地质导向方案，较好地指导了水平井的钻进。相对邻近直井而言，水平井单井产能提高了2倍以上，达到了预期的目标、取得了显著的经济效益。更多还原

【Abstract】 With the development of petroleum industry horizontal well drilling technique, as one of the effective method of improving individual-well producing rate , has obtained more and more extensive application in the world . Research and application logging geosteering technique of horizontal well drilling has been a very important project technique for successful drilling horizontal well.This study made a conclusion , namely , in order to realize geosteering , on the basis of making a better geological and drilling designation for horizontal well , we must make full use of MWD,LWD and integrate logging to identify lithology in real time, to interpret the LWD data and evaluate formation , to set up geological mode of target formation , to choose geosteering marked formation and compare simulative curves with LWD curves, to determine the drilling direction of bit upper and declination and the position in target oil-gas layer, to revise borehole track in real time, to make it extend in reservoir better interval as possible.Lithology identifying in real time can apply reliable lithology foundation for logging geosteering . In terms of well logging-facy identifying, based on curve automatic classifying and reading, we can extract some reflecting lithology parameter from the information of LWD to establish logfacy-lithfacy pattern and adopt gray conjunction method to recognize the rock type of drilling geological profile in real time.During drilling horizontal well, in order to follow and revise borehole track in real time, we must exact logging and geological pattern characteristic of target oil-gas formation and geosteering mark formation from information of offset straight well as reference pattern ,and create predicting mode of geosteering pattern to build simulative curve , and judge whether the bit has drilled the geological target oil-gas formation.Based on the study above, a software system of logging geosteering ofdrilling horizontal well is developed for MoBei oilfield in Xin Jiang . The system has provided some reasonable geosteering project and successfully steered drilling while it was applied to the process of drilling three horizontal well of MoBei oilfeild . Moreover, the oil output in each horizontal well increases by more than twice. All achieved the expectation aim and obtained remarkable economical benefit.更多还原