川西大兴场构造高压盐水层钻井技术  

DRILLING TECHNOLOGY UNDER ULTRA-HIGH PRESSURE BRINE WATER LAYER CONDITION OF DAXINGCHANG STRUCTURE IN WESTERN SICHUAN

作　　者：黄桢 赵靖影 黄有为[3] 牟鹤云 

机构地区：[1]西南油气田公司安全环保与技术监督研究院 [2]西南油气田公司页岩气开发事业部 [3]西南石油大学 [4]川庆钻探工程公司钻井液公司

出　　处：《钻采工艺》2016年第1期1-5,共5页Drilling & Production Technology

基　　金：四川省教育厅人文社科重点研究项目"鄂尔多斯盆地岩性气藏储量综合评价方法及应用研究"(编号:川油气科SKZ07-01)的资助

摘　　要：大兴场构造位于"上扬子地台"西部边缘,是川西中新坳陷雅安斜坡带上的一个大型隆起。大深001-X1井是该构造上二叠统底界构造高点附近的一口开发定向井,该井在雷四段意外钻遇多离子高压盐水层。盐水层最高压力当量密度达到2.18 g/cm3;盐水中离子成分复杂,K+、Mg2+、Ca2+浓度极高,Cl-处于过饱和状态。针对这两大难点,在该井第四次开钻中采用特别研发的具有优良抗盐抗高温能力的饱和盐水聚磺钻井液体系,分别制定了钻进和起下钻工况下的实用钻井液密度,配合钻井液中减阻润滑、即时封堵成分,依靠有效的钻井液维护技术和钻井工程技术措施,较为成功地解决了多离子高压盐水层条件下深井钻井中盐水侵、井漏、井壁垮塌、长裸眼段漏喷同存等诸多问题,顺利完成定向造斜钻进和尾管固井施工。Daxingchang structure is a large bulge located in Ya'an slope of western Sichuan Mesozoic and Cenozoic depression. Well DS001- X1 is a directional development well near the bottom boundary of upper Permian which drilled multi- ion and ultra- high pressure brine water layer in Leikoupo formation as an accident. The maximum pressure equivalent density of brine water layer is up to 2. 18 g / cm3 with high concentration of K+,Mg2 +and Ca2 +,furthermore Cl-here is supersaturated.Based on the two difficulties we took measures in fourth spudding as follows: specially developed saturated brine and polysulfonate drilling fluid system which has excellent resistance to high temperature and salt capability; practical drilling fluid density both in drilling and tripping; lubricate and real- time blocking additives in drilling fluid; effective maintenance technology of drilling fluid. Finally the problems have been solved in deep well under multi- ion and ultra- high pressure brine water layer condition such as salt water communication,leak,wall collapse. Directional drilling and liner cementing are successful completed.

关 键 词：盐水层 深井 多离子 异常高压 川西 

分 类 号：TE24[石油与天然气工程—油气井工程]