【摘要】：為了研究層理對頁巖儲層高度方向改造效果的影響,利用龍馬溪組頁巖露頭開展了大尺寸真三軸壓裂模擬實驗,分析了水力壓裂裂縫在儲層高度方向上的擴展規(guī)律,并通過聲發(fā)射定位解釋結果對不同實驗條件下的改造效果進行了定量評價。結果發(fā)現(xiàn):儲層高度方向的改造效果受垂向應力與層理特征的共同影響。高垂向應力(30 MPa)條件下,有利于溝通更多層理。弱膠結層理面會降低水力裂縫穿層的可能,顯著降低儲層高度方向的溝通效果。隨著層理開啟數(shù)量增多,裂縫形態(tài)更加復雜,儲層高度方向的改造越充分,有效改造體積也就越大。原始開啟層理面的擾動導致SRV與ESRV之間存在偏差。
[Abstract]:In order to study the effect of bedding on the reconstruction effect of shale reservoir height direction, the large size true triaxial fracturing simulation experiment was carried out by using the outcrop of shale in Longmaxi formation, and the propagation law of hydraulic fracturing fracture in the direction of reservoir height was analyzed. The reconstruction effect under different experimental conditions was evaluated quantitatively by the results of acoustic emission localization interpretation. The results show that the transformation effect of reservoir height direction is affected by vertical stress and bedding characteristics. Under the condition of high vertical stress (30 MPa), it is advantageous to communicate more stratification. The weakly cemented bedding surface can reduce the possibility of hydraulic fracture penetration and decrease the communication effect of reservoir height direction. With the increase of the number of bedding opening and the more complex fracture morphology, the more sufficient the reservoir height direction is, the larger the effective reconstruction volume will be. The disturbance of the original open plane leads to the deviation between SRV and ESRV.
【作者單位】： 川慶鉆探工程有限公司井下作業(yè)公司;中國石油大學(北京)石油工程學院;
【基金】：國家重大專項課題“水平井壓裂設計優(yōu)化系統(tǒng)”(2016ZX05023-001)
【分類號】：TE357.1

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