JH区块沙溪庙组致密砂岩气藏压裂缝高影响规律研究  

Study on the Influencing Law of Fracturing Fracture Height in Tight Sandstone Gas Reservoir of Shaximiao Formation in JH Block

作　　者：肖红林[1] 黎凯 侯甫 罗皓 唐慧莹 XIAO Honglin;LI Kai;HOU Fu;LUO Hao;TANG Huiying(PetroChina Southwest Oil&Gas Field Company,Chengdu 610051,China;Chuanqing Drilling Well Operation Company,Ltd.,Chengdu 610051,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610051,China)

机构地区：[1]中国石油西南油气田分公司,成都610051 [2]川庆钻探井下作业公司,成都610051 [3]西南石油大学油气藏地质及开发工程国家重点实验室,成都610051

出　　处：《科技和产业》2023年第23期196-207,共12页Science Technology and Industry

基　　金：四川盆地中西部地区致密气勘探开发理论及关键技术研究项目(2022ZD01)。

摘　　要：致密砂岩油气作为非常规油气资源之一,已成为油气增储上产的“重点领域”与“亮点类型”。其中四川盆地JH区块沙溪庙组致密气资源丰富,河道砂体广泛发育,开发潜力巨大。致密砂岩气藏低孔低渗的特性决定了只有采用水平井分段压裂才能实现其规模效益开发,而在水力压裂过程中,裂缝高度控制是一件很棘手的问题。基于此,以JH区块为研究背景,建立三维层状介质压裂数值模拟模型,以现场压裂施工数据和井温测井缝高数据为基础,优选P3D裂缝扩展模型,进而分析工程、地质因素对裂缝垂向扩展行为的影响和控制作用。研究结果表明,不可控地质因素中储隔层应力差是影响裂缝高度的最关键因素,当储隔层最小水平主应力差达4~6 MPa后,裂缝几乎不会发生穿层;杨氏模量影响较小,泊松比几乎没影响;可控工程因素中施工排量和压裂液黏度对缝高影响较大,低排量和低黏度有助于控制缝高。As one of the unconventional oil and gas resources,tight sandstone oil and gas has become a“key area”and“highlight type”for oil and gas storage and production increase.Among them,the Sichuan Basin JH block is rich in tight gas resources,and the river sand body is widely developed,with great development potential.The low porosity and low permeability of tight sandstone gas reservoir determines that only horizontal wells with segmental fracturing can be used to realize its scale and efficiency development,and the fracture height control is a very difficult problem in the process of hydraulic fracturing.Based on this,taking the JH block as the research background,a 3D layered media fracturing numerical simulation model is established.Combined with field fracturing stimulation data and well temperature logging fracture height data,P3D is selected as the fracture propagation model.Furthermore,the influence and control of engineering and geological factors on the vertical propagation behavior of fractures are analyzed.The research results show that among the uncontrollable geological factors,the stress difference between reservoirs and interlayers is the most critical factor that affects the fracture height.When the minimum horizontal principal stress difference in the reservoir compartment reaches 4~6 MPa,fractures will hardly penetrate layers.Young’s modulus has little effect and Poisson’s ratio has almost no effect.Among the controllable engineering factors,pumping rate and fracturing fluid viscosity have great influence on fracture height.Low pumping rate and low viscosity contribute to control fracture height.

关 键 词：四川盆地 水力压裂 缝高控制 致密砂岩气藏 数值模拟 

分 类 号：TE323[石油与天然气工程—油气田开发工程]