新疆石油地质 ›› 2026, Vol. 47 ›› Issue (4): 443-450.doi: 10.7657/XJPG20260407

• 油藏工程 • 上一篇    下一篇

井震联合预测呼西背斜胜金口组高压盐水层及孔隙压力

李建国1(), 邹灵战1, 徐新纽2a, 阮彪2a, 黄鸿2a, 尹虹橙2a, 席传明2b, 徐小龙2a   

  1. 1 中国石油集团工程技术研究院有限公司北京 102206
    2 中国石油 新疆油田分公司 a.勘探事业部b.采油工艺研究院新疆 克拉玛依 834000
  • 收稿日期:2025-03-20 修回日期:2025-07-14 接受日期:2025-07-31 出版日期:2026-08-01 发布日期:2026-07-30
  • 作者简介:李建国(1982-),男,内蒙古呼伦贝尔人,高级工程师,硕士,地震资料解释,(Tel)13703229258(Email)13703229258@163.com
  • 基金资助:
    国家科技重大专项(2024ZD14060003);新疆维吾尔自治区重大科技专项(2024A01010-4)

Well-Seismic Integrated Prediction of High-Pressure Brine Layer and Pore Pressure in the Shengjinkou Formation of Huxi Anticline, Junggar Basin

LI Jianguo1(), ZOU Lingzhan1, XU Xinniu2a, RUAN Biao2a, HUANG Hong2a, YIN Hongcheng2a, XI Chuanming2b, XU Xiaolong2a   

  1. 1 Engineering Technology R&D Company Limited, CNPC, Beijing 102206, China
    2 PetroChina Xinjiang Oilfield Company, a. Exploration Division; b. Oil Production Technology Research Institute, Karamay, Xinjiang 834000, China
  • Received:2025-03-20 Revised:2025-07-14 Accepted:2025-07-31 Published:2026-08-01 Online:2026-07-30

摘要:

准噶尔盆地呼西背斜胜金口组钻遇了高压盐水层,溢漏同存制约钻井提速,亟需解决精准预测高压盐水层的三维展布及孔隙压力问题。综合钻井、录井、测井和地震资料,采用井震联合、由点到体的方式开展研究,通过井点处高压盐水层的地震特征和构造特征分析高压盐水层成因,并利用孔隙压力当量密度与地震道积分层段属性的拟合关系预测高压盐水层的孔隙压力。结果表明,呼西背斜胜金口组高压盐水层的成因为断缝体含水-致密层封堵,其分布与到断层距离相关;高压盐水层孔隙压力低值位于断层破碎带边缘,水侵风险低,孔隙压力高值位于断层破碎带中部和断缝发育区,水侵风险高。该方法为钻井工程风险的识别与防控、精细控压及放水降压等作业提供了决策依据。

关键词: 准噶尔盆地, 呼西背斜, 胜金口组, 井震联合, 高压盐水层, 孔隙压力

Abstract:

High-pressure brine layers were encountered while drilling in the Shengjinkou formation of the Huxi anticline, Junggar Basin. The coexistence of kicks and lost circulation restricted drilling rate. Therefore, it is necessary to accurately predict the 3D distribution and pore pressure of these high-pressure brine layers. This study adopts well-seismic integration and “point-to-volume” prediction approach based on drilling, mud logging, well logging, and seismic data. The genesis of high-pressure brine layers was analyzed using seismic and structural characteristics at well sites. The pore pressure was predicted based on the correlation between pore pressure equivalent density and seismic trace integral interval attributes. The results show that the high-pressure brine layers in the Shengjinkou formation of the Huxi anticline originate from water-bearing fault-fracture bodies sealed by tight layers, and their distribution correlates with the distance from faults. Low pore pressure zones in the high-pressure brine layers occur at the edges of fault damage zones, where water invasion risk is low. In contrast, high pore pressure zones are located in the fault-fracture areas and the central parts of fault damage zones, where water invasion risk is high. These findings provide a basis for decision-making in risk identification, prevention and control, precise pressure control, and pressure reduction via drainage.

Key words: Junggar Basin, Huxi anticline, Shengjinkou formation, well-seismic integration, high-pressure brine layer, pore pressure

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