川西大兴场构造高压盐水层钻井技术
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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.
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.
引文
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[2]李子成.钻井中对高压低渗透盐水层的一种新处理方法[J].河南石油,1997,11(6):32-34.
[3]陈礼彬.钻遇盐水层的处理技术[J].钻采工艺,1997,20(3):79-82.
[4]谢金稳,周德军,钱琪祥.钻遇高压低渗盐水层是否压稳钻进探讨[J].新疆石油科技,1998,8(2):23-25.
[5]徐国盛,陈美玲,刘为,等.川西地区雷口坡组岩相古地理与富钾卤水预测[J].矿床地质,2012,31(2):309-322.
[6]贾立强,梁红军,迟军.塔北羊塔克第三系盐下凝析油气藏钻井技术[J].天然气工业,1999,19(2):68-71.
[7]王京光,张小平,杨斌,等.一种抗高温高密度饱和盐水钻井液的研制[J].天然气工业,2012,32(8):79-81.
[8]杨晓冰,蔺志鹏,陈鑫,等.土库曼斯坦南约洛坦气田复杂盐膏层钻井液技术[J].天然气工业,2011,31(7):55-58.
[9]张志财,孙明波.超高密度抗高温饱和盐水钻井液技术[J].钻井液与完井液,2010,27(5):12-14.