油源断裂优势通道输导油气能力综合评价方法及其应用

为了研究断裂在下生上储式油气成藏中的作用,在油源断裂优势通道输导油气能力影响研究的基础上,利用油源断裂优势通道本身的发育特征和源岩品质,构建了油源断裂优势通道输导油气能力综合评价参数指标,建立了一套油源断裂优势通道输导油气能力综合评价方法,并将其应用于渤海湾盆地冀中坳陷留楚地区东三段储层10条主要油源断裂优势通道输导油气能力的评价中。结果表明,留楚地区东三段储层10条主要油源断裂共34条优势通道,其中:有8条输导油气能力综合评价等级为强,主要分布在北部留楚背斜区;有15条输导油气能力综合评价等级为中等,主要分布在留楚南背斜区;有11条输导油气能力综合评价为弱,主要分布在南部和东部边部地区。这与目前留楚地区东三段储层只在北部留楚背斜核部找到大量油、中部留楚南背斜找到少量油相吻合,表明该方法用于油源断裂优势通道输导油气能力综合评价是可行的。

Comprehensive Evaluation Method and Its Application of Oil Carrying Capacity Through Dominant Channel of Oil Source Fault

In order to study the role of fault in the down oil-gas generation and upper accumulation,based on the study of oil source fault dominant channel transportation capability,the authors established a set of comprehensive evaluation parameters of oil source fault dominant channel transportation capability by using its development characteristics and the quality of the source rock,and then applied it into 10 major oil source fault dominant channels for the evaluation of their transportation capability in E3d3 reservoir,Bohai bay basin,and Jizhong depress.The study shows that there are 10 major oil source faults of E3d3 reservoir in Liuchu with 34 dominant channels developed.Of them,8 channels with high transportation capability are mainly distributed in the northern Liuchu anticline,15 channels with middle transportation capability are mainly distributed in Liuchunan anticline,and 11 channels with weak transportation capability are mainly distributed in the southern and eastern edges.These results are consistent with the current distribution of the oil-gas found in the north core of E3d3 reservoir anticline and the middle section of Liuchu anticline.The method is proved to be useful for the comprehensive evaluation of an oil source fault dominant channel transportation capability.