利用地应力测量技术探查油井地层注水分布特征

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Abstract Water injection oil displacement through oil well stratum fracturing can enhance oil recovery factor，and the determination of stratum aquifer distribution after water injection is important basis for appropriately designing injection production well network. The natural electromagnetic wave in-situ stress measurement has been applied to detect the distribution features of stratum water injection in Zhouzhuang well G1. The voltage value obtained through measurement is converted into in-situ stress. Research results show that in-situ stress value has a certain correlation with the water abundance，low in-situ stress value is corresponding to abundant water，high in-situ stress value is low water abundance or have no water. Water injection influence scope and water abundance plane distribution features have been analyzed based on the horizontal and vertical distribution of in-situ stress and aquifer thickness in water injection section. The test result of the exploration shows that existing two water abundance low in-situ stress value zones trending near NS direction at 40 m east and 50 m southwest of well G1. The correctness of the result has been proved by afterwards oil production，this method provides a effective technical means for old oil well potential tapping.

Key words： petroleum engineering in-situ stress measurement stratum water injection of oil well injection- production pattern water injection distribution

Received: 12 September 2011

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http://www.rockmech.org/EN/Y2012/V31/Is2/3869

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