水平井地质导向技术在临兴中区块开发中的应用

Application of Horizontal Well Geo-Steering Technology in Middle Linxing Block Development

摘要: 临兴中区块是典型的低压、低孔、低渗、自然产能低的致密气藏，区内储层非均质性强、分布不稳定，砂体平面连续性差，气田开发过程中面临着直井、定向井井控产量不足的问题，采用水平井开发是提高井口产量的有效办法；局部地区存在微构造及岩性变化，水平井实施过程中有一定的困难。为克服困难，保证钻井成功同时提高储层钻遇率，本文从精细地层对比出发进而展开研究区内的储层及沉积研究，结合地震反演预测结果精细刻画储层构造模型，利用电性界面随钻中实时矫正构造模型指导落靶，水平段采用岩性精细对比结合钻井参数、录井信息、随钻曲线等对储层构造及岩性变化进行准确识别和预判，为水平井随钻调整提供有利支持。

Abstract: Middle Linxing block is the typical tight gas reservoirs with low pressure, low porosity, low permeability and low natural productivity as well as strong reservoir heterogeneity, unstable reservoir distribution and poor reservoir connectivity. During the development phase, due to the limited well control OOIP of vertical and deviated wells, horizontal wells is very efficient way to improve the production. There are micro structure and lithology changes in some local areas, so it is difficult to drill horizontal wells. In order to overcome the difficulties and ensure the success of drilling and improve the rate of reservoir drilling, this paper carries out the reservoir and sedimentary research in the study area from the fine stratigraphic correlation, then, fine depicts the reservoir structural model combined with the results of seismic inversion and prediction and uses the real-time correction of the structural model in the electrical interface while drilling to guide the target. And the fine lithology correlation in the horizontal section is used, combined with the drilling parameters and logging information while drilling curves can accurately identify and predict the structural and lithology changes of the reservoir, which provides favorable support for the adjustment while drilling horizontal wells.