【作者】 王敬朋; 张伟; 吴继伟; 魏瑞华; 马锦明; 杨虎;
【Author】 WANG Jingpeng;ZHANG Wei;WU Jiwei;WEI Ruihua;MA Jinming;YANG Hu;
【机构】 “油气藏地质及开发工程”国家重点实验室(西南石油大学); 中国石油新疆油田分公司; 中石化石油工程技术研究院有限公司; 中国石油大学(北京)克拉玛依校区;
【摘要】 呼探1井φ139.7 mm尾管固井由于封固段长、井底温度高,造成存在漏失与溢流风险大、对水泥浆性能要求高及水泥浆稠化时间不易控制等技术难点。为解决上述技术难点,该井φ139.7 mm尾管固井进行了精细动态控压固井技术试验。该井通过优化水泥浆配方、精细设计浆柱和优化设计套管扶正器安放位置,制定确保井筒动态压力介于地层孔隙压力与漏失压力之间等技术措施,利用精细控压钻井装备,实现了控压下尾管、注水泥和水泥浆候凝,最终实现全过程精细动态控压固井,该井φ139.7 mm尾管固井质量合格。呼探1井φ139.7 mm尾管精细控压固井的成功表明,精细控压固井能够有效提高超深井长封固段窄安全压力窗口地层的固井质量,为准噶尔盆地南缘深层油气勘探提供技术保障。更多还原
【Abstract】 There are some cementing problems in the deep layer of the southern margin of Junggar basin, such as active oil, gas and water, deep burial, high temperature and high pressure, narrow safety pressure window and so on. Using conventional cementing technology is easy to lose circulation, resulting in cementing failure or unqualified quality. In Hutan-1 well with multiple reservoirs, coexistence of high and low pressure, long sealing and solid section (4069 m) and long open hole section (1907 m), the fine dynamic pressure control cementing technology is applied to successfully solve the problem of multi pressure system cementing in the oil and gas well section of the same open hole section. The fine pressure control cementing technology test includes: designing the construction scheme and parameters from the aspects of wellbore preparation, casing running technical measures, annulus slurry column structure design, injection displacement parameters, loss of circulation well control risk prediction, solid completion annulus plus back pressure, etc., and implementing the wellhead fine pressure control by reducing the hydrostatic column pressure and using the fine pressure control drilling equipment to ensure that the wellbore dynamic pressure is between the formation pore pressure and leakage pressure, Finally, the whole process of fine dynamic pressure control cementing is realized. Hutan 1 well Φ The successful cementing test of 139.7mm liner shows that fine pressure control cementing can effectively improve the cementing quality of ultra deep wells with long sealing section and narrow safety pressure window, and provide technical support for deep oil and gas exploration in the southern margin of Junggar Basin.更多还原
【基金】 中国石油重大专项“准噶尔南缘和玛湖等重点地区优快钻完井技术集成与试验”(编号:202019F-33)联合资助