The Study Of Acid Fracturing Design In Carbonate Reservoir Of Yanchang Majiagou Formation

Carbonate gas reservoir of Yanchang Majiagou formation never systematically studies from the perspective of acid fracturing,we know little about geological features and reservoir physical properties,there are no system of wells selected principles and acid fracturing technology for Majiagou formation characteristics.Aiming at the target reservoir characteristic,study on acid-fracturing technology suitable for the target area.To ensure the adaptiveness of acid fracturing in this zone,experiments on cores are made to gain the carbonate components,HCl dissolution rate and so on.Selected the most suitable for the area of acidizing fluid system and optimizing its primary agent dosage aimed at the reservoir temperature big change.Using Fracpro PT analysis and simulate different in-situ stress difference and interlayer insulation thickness influence on frauture height extension rule,optimizeing the construction parameters for 15 m and 25 m frauture height.The selection principle are put forward according to the area of the layer,eventually formed suitable for target area of three different types of reservoir acid fracturing technology.This paper presents the acid fracturing technology for Majiagou formation what effection improved obviously than ever,which important guilding significance to carbonate reservoir of Yanchang Majiagou formation’s stimulation and production.