Optimization Study On Horizontal Well Crack Parameters Of Anyuexu Gas Reservoir

Anyue Xujiahe gas reservoir in the main oil and gas producing XUJIAHE layer,the reservoir longitudinal multilayer span,poor lateral continuity of strong reservoir heterogeneity.Staged fracturing of horizontal wells is to develop effective measures to Anyue shall be two heterogeneous reservoirs.After the early part of the transformation of the well to obtain a better production capacity,while some wells less effective transformation,analysis mainly due to reservoir heterogeneity of the lead after the horizontal well fracturing effect significant difference.In this paper,current research through extensive research,in Anyue shall be fully integrated reservoir characteristics of the two,based on the geological model of horizontal well into a homogeneous class of reservoir and reservoir heterogeneity class categories,and established the corresponding fractured horizontal wells fracture parameter optimization design model.(1)For a relatively homogeneous fractured horizontal well fracturing optimization problems,combined with fracturing segment focused on the actual situation is relatively homogeneous segments,dividing the length of the horizontal section of reservoir heterogeneity into several uniform segment unit;uniform segment as the research unit,within an integrated high-speed non-Darcy gas crack,support with injuries and other factors,with the largest production capacity of fractured well as the target,considering the fracture length,fracture width,fracturing materials and reservoir properties,fluid best match the nature of the use of proppant index,established optimal design theory heterogeneous reservoir parameters of fractured horizontal wells fracture;and the preparation of the corresponding non-homogeneous reservoir fracturing horizontal wells to optimize the design and evaluation software.(2)For strong heterogeneous reservoirs,according to drilled horizontal wells geology,drilling and logging,logging data,the establishment of a horizontal well drilling direction heterogeneous reservoir model;on this basis,the application of numerical simulation software,through the implantation of artificial fractures,compared simulated crack in the same parameters were homogeneous,heterogeneous reservoir fracturing horizontal well production results;Anyue shall form the two gas reservoirs heterogeneous reservoir horizontal well fracturing fracture parameters optimization method;and further geological characteristics of the reservoir to be two Anyue divided into three categories,based on the numerical simulation of heterogeneous reservoir fractured horizontal well established production methods,preferably with all types of reservoirs matches Best fracture parameters;Fractured horizontal wells to evaluate and optimize the application of these research results in Anyue two were to be applied to obtain the following results and conclusions:(1)The evaluation results indicate that Y101-75-H1 well fracture length,fracture width,respectively,and optimal fracture length,fracture width is similar,indicating that the well design is more reasonable pre-fracture parameters;Y101-77-H1 well and Yue Aperture crack each cluster Y101-78-H1 well is too large,too small and fracture length.(2)According to the differences between homogeneous and heterogeneous model model production response,suggested a more accurate response heterogeneity model for horizontal wells fracture strength parameter optimization,etc.,during the fracture parameter optimization should take full account reservoir geological characteristics,specific design parameters of each fracture crack segment,so that the full transformation of the reservoir,and to maximize productivity.(3)Heterogeneous reservoir parameters of fractured horizontal well fractures optimal design method applied to establish assessment showed that 101-75-H1 well,for example,to get the optimum fracture parameter optimization will crack arranged to heterogeneous reservoirs single well fracture number,find the optimized reduction,well production increase and the average increase in production of single seam.(4)Based on the basic parameters of Anyue two horizontal wells to optimize reservoir characteristics of three types of fracture length and conductivity as the goal,to get the construction of three types of reservoir parameters.The research results to further improve the Anyue Xujiahe of fracturing technology and promote the effective use of tight gas resources is significant.