却勒1油藏储层地质特征及伤害因素试验研究
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摘要
却勒1油藏是分流河道沉积并由构造控制的层状边水油藏,储层特征决定了其在开发过程中存在一定的潜在伤害因素。通过对实际岩心分析测试和敏感性伤害评价实验,并结合储层地质特征分析研究,明确了却勒1油藏储层的碎屑颗粒成分、填隙物、结构、物性和非均质性特征;敏感性伤害评价实验研究结果表明:液相侵入导致水锁、自吸水膨胀是第一位潜在伤害因素;液相侵入形成的水敏、盐敏、酸敏、碱敏是第二位潜在的伤害因素;由压力突增而形成的速敏、压敏是第三位的潜在伤害因素。
Quele-1 Oil Reservoir is characterized by distributary channel deposit, structural control and laminar edge-water reservoir. According to laboratory analysis on the core test and damage evaluation test of the sensibility, there are some potential damage factors in exploitation. Through research of geologic characteristics, it shows that the reservoir has the features of clastic granular particle, interstitial matter, texture, physical property and heterogeneity. By the damage evaluation of the sensibility, it indicates that the invading liquid phase results in the water locking and shale expansion, which is the most important factor of potential damage. The invading liquid phase can also cause the sensitivity of water, brine, acid and alkaline, which is the second potential damage factor. Velocity and pressure sensitivities caused by pressure jump are the third potential damage factors.
Quele-1 Oil Reservoir is characterized by distributary channel deposit, structural control and laminar edge-water reservoir. According to laboratory analysis on the core test and damage evaluation test of the sensibility, there are some potential damage factors in exploitation. Through research of geologic characteristics, it shows that the reservoir has the features of clastic granular particle, interstitial matter, texture, physical property and heterogeneity. By the damage evaluation of the sensibility, it indicates that the invading liquid phase results in the water locking and shale expansion, which is the most important factor of potential damage. The invading liquid phase can also cause the sensitivity of water, brine, acid and alkaline, which is the second potential damage factor. Velocity and pressure sensitivities caused by pressure jump are the third potential damage factors.
引文
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3朱志新,田文全,倪梁,等.新疆东天山西段却勒塔格蛇绿岩地球化学特征.新疆地质,2004;22(2)
4旷红伟,高振中,翟永红,等.塔里木盆地库车坳陷第三系储层特征研究.石油学报,2003;24(1)
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