准噶尔盆地南缘新近系膏质岩特征分析及其对地层压力影响研究
China Mining Magazine（2022）
Abstract
准噶尔盆地南缘复杂的地层压力给钻井工程带来极大困难.研究表明,准噶尔盆地南缘尤其高泉地区,地层异常高压的成因机制除了泥岩欠压实作用和构造增压作用之外,与膏质岩发育情况密切相关.该区膏质岩相对围岩以低伽马值为显著特征,膏质岩发育层段为异常高压段,上覆地层为常压段,下覆地层为超强高压段.安集海组超强高压得益于上覆沙湾组厚层膏质岩的强力封闭作用.
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