CAJ | 학술논문

地应力剖面的研制为测井资料开辟了新的应用领域。通过对川西XL气田4口井的地应力剖面分析，川西XL气田沙溪庙组储层岩石力学参数、三向主应力、水平应力场方向、工程常用压力及出砂指数有如下特征：孔隙、裂缝的发育程度能够对储层的力学性质产生影响；三向主应力一般满足关系式：σH＞σV＞σh，裂隙发育的层位水平主应力、破裂压力较围岩低，坍塌压力较围岩高；水平主应力方向与川西区域构造水平主应力方向基本一致，但个别层位主应力方向发生了较大变化；出砂指数值较高，基本不存在出砂现象。
지응력부면적연제위측정자료개벽료신적응용영역。통과대천서XL기전4구정적지응력부면분석，천서XL기전사계묘조저층암석역학삼수、삼향주응력、수평응력장방향、공정상용압력급출사지수유여하특정：공극、렬봉적발육정도능구대저층적역학성질산생영향；삼향주응력일반만족관계식：σH＞σV＞σh，렬극발육적층위수평주응력、파렬압력교위암저，담탑압력교위암고；수평주응력방향여천서구역구조수평주응력방향기본일치，단개별층위주응력방향발생료교대변화；출사지수치교고，기본불존재출사현상。
The development of geostress profile has opened a new field forlog data application.According to the analysis of the geostress field of 4 wells in XL Gasfield in West Sichuan,the rock dynamic parameters,the 3-D principal stress,the direction of horizontal stress field,the common engineering pressure and sand producing index of the reservoir in Shaximaio Formation of XL Gasfield in West Sichuan have following characters:1.the development degree of porosity and fractures can effect reservoir dynamic property;2.3-D principal stress could usually satisfy the following relational expression:σH＞σV＞σh,the horizontal stress and breakdown pressure of fracture developed horizon are usually lower than that of country rock,but the slump pressure is higher than that of the country rock;3.horizontal principal stress basically coincides with horizontal principal stress of regional tectonics in West Sichuan excepting particular horizons;4.sand producing index is high and there is no sand produced.