致密砂岩气藏高温高压敏感性评价及机理探讨——以塔里木盆地B区块致密气藏为例

发布时间：2019-02-22 21:10

【摘要】：致密砂岩气藏储量丰富,因其低孔低渗、高毛细管力、高黏土矿物含量、孔喉细小、非均质严重等特点,导致其易受到敏感性损害。目前大多数敏感性评价研究针对常规中、低渗储层,对于致密砂岩气藏敏感性评价技术尚未成熟。文中以塔里木盆地B区块致密砂岩气藏为例,通过岩心流动实验,进行模拟地层条件下的高温高压敏感性评价。结果表明,该区块高温高压敏感性具有弱速敏损害、中等偏强水敏损害、中等偏弱盐敏损害、中偏弱碱敏损害、弱酸敏损害、强应力敏感损害的特点。进一步运用X射线衍射、扫描电镜、铸体薄片等测试手段,分析了B区块致密气藏矿物类型、体积分数、形态及分布特征,剖析了敏感性的成因——储层敏感性矿物及微观孔喉结构。
[Abstract]:The tight sandstone gas reservoir is rich in reserves, which is easily damaged by sensitivity due to its characteristics of low porosity and low permeability, high capillary force, high clay mineral content, fine pore throat and serious heterogeneity. At present, most of the sensitivity evaluation studies are aimed at conventional low permeability reservoirs, but the sensitivity evaluation techniques for tight sandstone reservoirs are not yet mature. Taking tight sandstone gas reservoir in block B of Tarim Basin as an example, the sensitivity evaluation of high temperature and high pressure under simulated formation conditions is carried out by core flow experiment. The results show that the sensitivity to high temperature and high pressure in this block is characterized by weak speed sensitivity, moderate water sensitivity, moderate salt sensitivity, middle partial weak alkali sensitivity, weak acid sensitivity and strong stress sensitive damage. The mineral types, volume fraction, morphology and distribution characteristics of dense gas reservoirs in block B are further analyzed by means of X-ray diffraction, scanning electron microscope and thin sheet casting. The genesis of sensitivity, reservoir sensitive minerals and micro pore throat structure, are analyzed.
【作者单位】：中国石油塔里木油田分公司油气工程研究院;中国石油大学(华东)石油工程学院;
【基金】：国家科技重大专项课题“复杂地质条件下深井钻井液与高温高压固井技术研究”(2011ZX05021-004) 中国石油天然气股份有限公司科学研究与技术开发项目“碳酸盐岩安全、快速、高效钻完井技术”(2010E-2109)
【分类号】：TE37

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