长庆低渗透油气田分支井钻完井技术综述

DRILLING AND COMPLETION TECHNOLOGIES OF LATERAL WELL IN CHANGQING LOW PERMEABILITY OIL AND GAS FIELD

分支井技术是水平井、侧钻井技术的集成和发展,是继水平井之后的又一重要的改善油田开发效果和提高原油采收率的有效手段,它将会在油气田开发中得到越来越广泛的应用。近年来,随着分支井技术及相应的钻完井技术和储层改造技术、工具的发展,长庆油田认真分析长庆"三低"油气藏地质特点和分支井的应用优势,逐步展开了分支井的应用试验,完成了多口分支井施工,不断探索适合于长庆"三低"油气田勘探开发的分支井钻完井关键技术和相应的配套工具。分支井技术将是长庆油田继水平井之后的又一重要的提高和改善油田开发效果及原油采收率的先进技术。

The lateral horizontal well techniques are important technical measures for improving oilfield development effect and oil recovery factor,and it have been widely used in oil and gas field development. Changqing Oilfield belongs to low pressure,low permeability and low abundance reservoir( 'three low'reservoir),with the development of 'three low'reservoir,the conventional drilling and completion technologies can't meet the need of oilfield development. In order to improve the development effect of'three low'reservoir,the features of'three low'reservoir were analyzed and the drilling and completion technologies of lateral horizontal well were applied in some wells. The key drilling and completion technologies and corresponding matching tools of lateral horizontal well suited for Changqing 'three low'reservoir were formed. Field application results showed that the lateral horizontal well techniques could improve greatly the development effect of'three low'reservoir.