临兴地区砂岩两层合采接替时机优选实验

Unconventional Oil & Gas(2017)

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Abstract
以临兴地区石盒子组2段和7段砂岩地层为目标,利用直径25mm岩心柱塞,根据现场测试资料控制柱塞温度、围压、柱塞出口压力,评价地层压力对砂岩两层合采产能的影响,为临兴地区砂岩两层合采接替时机的优选提供实验数据.研究表明,随H2段砂岩柱塞合采接替压力由14.98MPa降至9.58MPa,H2段与H7段柱塞单层干扰指数均先增后减,接替压力为12.05MPa时,两个砂岩单层干扰指数最高,分别达9.20%和14.54%.接替压力最大时,干扰程度最低.建议现场选择地层打开初期作为接替时机.
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