本文選題：水平井 + 壓裂　； 參考：《石油鉆探技術》2017年05期

【摘要】：針對水平井壓裂裂縫難以識別的問題,研究了基于聲波變密度測井(VDL)信息的水平井壓裂裂縫識別方法。首先進行水平井壓裂裂縫的VDL模擬試驗,研究壓裂裂縫的VDL響應特征,然后用實際井壓裂前后的VDL資料進行壓裂井段識別與效果評價。研究表明:當?shù)谝�、二界面膠結良好時,非裂縫段套管波的波幅很小、地層波的波幅較大,VDL圖中地層波相線粗而明顯;隨著裂縫段接收與發(fā)射探頭間裂縫數(shù)量增多,套管波的波幅增大、地層波的波幅減小,VDL圖中地層波呈灰白色而模糊不清、彎曲率大、成"人"字形,其地層縱波時差增大、能量降低。模擬試驗和現(xiàn)場應用均驗證了利用VDL識別水平井橫向壓裂裂縫的可行性,可見VDL信息可為水平井壓裂裂縫檢測與壓裂效果評價提供依據(jù)。
[Abstract]:In order to solve the problem that fracture is difficult to identify in horizontal wells, a fracture recognition method based on acoustic variable density logging (VDL) information is studied in this paper. First, the VDL simulation test of fractured fractures in horizontal wells was carried out to study the VDL response characteristics of fracturing fractures, and then the recognition and effect evaluation of fracturing wells were carried out with VDL data before and after fracturing. The results show that when the first and second interfaces are cemented well, the amplitude of the casing wave in the non-fractured section is very small and the wave amplitude of the formation wave is larger than that in the VDL diagram, and the number of fractures between the two probes increases with the increase of the fracture segment. The wave amplitude of casing wave increases, the wave amplitude of formation wave decreases. The formation wave in the VDL map is gray white and fuzzy, and its bending rate is large. The formation wave has the shape of "human", and its P-wave time difference increases and its energy decreases. The feasibility of using VDL to identify horizontal fracturing fractures in horizontal wells is verified by simulation test and field application. It can be seen that VDL information can provide basis for fracture detection and fracturing effect evaluation in horizontal wells.
【作者單位】： 油氣藏地質及開發(fā)工程國家重點實驗室(西南石油大學);中國石油集團測井有限公司長慶事業(yè)部;
【基金】：國家重點基礎研究發(fā)展計劃(“973”計劃)項目子課題“頁巖氣水平井井眼軌跡優(yōu)化設計與地質導向理論研究”(編號:2013CB228003)資助
【分類號】：TE357.1

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