杏子川油田前山区块长2低阻油层测井识别研究

Study on the characteristics of the Chang2 Reservoir low-resistance oil layer in front of the Pingqiao Qianshan,Xingzichuan Oilfield

为进一步明确杏子川油田前山区块长2油层的分布特征,基于生产实践和大量的文献调研,从地质因素和物理因素两方面分析了其成因,运用多种方法对低阻油层进行了识别,最终得出解释标准:1)声波时差AC≥228μs/m,侵入因子≤0.2且深感应电阻RILD≥11Ω·m,为油水同层;2)声波时差AC≥228μs/m,侵入因子>0.2且深感应电阻RILD≥12Ω·m,为油水同层;3)声波时差AC<228μs/m,深感应电阻RILD≥20Ω·m,为干层;4)其他情况为水层。以上成果认识对杏子川油田下步勘探开发指明了方向,同时对于国内同类油藏的有效开发具有一定借鉴作用。

In order to further clarify the distribution characteristics of the Chang 2 oil layer in Qianshan block of Xingzichuan Oilfield,based on production practice and a large number of literature research,this paper analyzes its causes from both geological and physical factors,further uses a variety of methods to identify the low-resistivity oil layer,and finally obtains the interpretation criteria:1)Acoustic time difference AC≥228μs/m,intrusion factor≤0.2 and deep sensing resistance RILD≥11Ω·m,oil and water in the same layer;2)Acoustic time difference AC≥228μs/m,intrusion factor>0.2 and deep sensing resistance RILD≥12Ω·m,oil and water in the same layer;3)Acoustic time difference AC<228μs/m,deep sensing resistance RILD≥20Ω·m,dry layer;4)Water layer in other cases.The above knowledge points out the direction for the next exploration and development of Xingzichuan oilfield,and has a certain reference for the effective development of similar reservoirs in China.