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- hydraulic fracture shape 裂缝形态
- Studies on hydraulic fracture of high concrete gravity dam were carried out with the interface model developed. 同时，利用所建立的考虑缝面水压的接触面模型对高重力坝坝踵水力劈裂展开了初步研究。
- The borehole falling and hydraulic fracture during drilling have a close relation with the distribution of stress field. 钻井过程中井眼跨塌、水力压裂裂缝的形成与应力场的分布有十分密切的关系。
- The fracture position, appearance and fracture shape of lock blade of oil accessory in aero_engine due to microvibration are discussed. 介绍了航空发动机滑油附件锁片发生失效的断裂部位、外观及断口的形貌特征；
- It is well known the there is a great effect on the fracture promulgation and shapes by property of fracture fluid in the hydraulic fracture during the hydraulic operations. 在水力压裂过程中,缝内流体的流动特征对裂缝的延伸和形态具有很大的影响。
- The dimensionless net pressure, difference of Yang’s modulus and fracture toughness between reservoir and salutatory barrier also affected the behaviors of hydraulic fracture. 产层与突变体之间的弹性模量差异、断裂韧性差异以及缝内净压力无因次量是影响裂缝走向的重要因素。
- Actually, hydraulic fracture technology has now matured at abroad and home, but the approach of quality control over the field construction of technology needs further perfecting. 在国内外,水力压裂工艺目前已经非常成熟,但工艺现场施工这个环节的质量控制手段还有待进一步的完善。
- Based on many experiments, this paper discusses the effect of rock modulus of elasticity on fracture shape and operating pressure, presents the testing method of Biot coefficient,and introduces its applications in calculation of horizontal stress. 本文在一系列试验的基础上，描述了岩石弹性模量对压裂裂缝几何形状、施工压力等的影响，并给出了毕奥特系数的试验方法及其在水平应力计算中的应用。
- The paper sequentially analyzed the starting-crack mechanism of hydraulic fracture bore which lies in coal delamination or lies between two coal delaminations or through many coal delaminations. 进而论文分析阐述了煤分层中钻孔、分层层面钻孔、以及穿层钻孔水力压裂的起裂机理。
- The process of hydraulic fracture connection and solution mining is a complicated course, which involves hydraulic fracture expanding, convection, pervasion, quality and heat passing and so on. 对水压致裂连通溶解开采的过程及机理 ,在理论上进行了一定的分析 ,其内容主要包括 :岩盐矿层内水力裂缝的起裂扩展、盐矿物的溶解等。
- At the tip end of fracture,there is very high stress and dilatancy occurs during hydraulic fracturing. 水力压裂中,由于缝内压力平衡了水平地应力,形成了产生压胀的条件,已经是石油界公认的事实。
- How to handle uncertain and moveable boundaries of a fracture is one of the key issues that is faced by the Full Three Dimension Hydraulic Fracture Numerical Simulation Technique(FTDHFNST). 处理任意形状且属于运动的裂缝边界是全三维水力压裂数值模拟技术所面临的技术难题之一。
- Frac and pack technique is a combination of hydraulic fracturing andgravel packing.It can control fracture geometry to get"wide and shortfracture". 压裂防砂技术将压裂增产与充填防砂方法相结合,在油层形成短而宽的填砂裂缝,能够起到增产与防砂的双重效果。
- It is necessary to predict hydraulic fracture height for providing pumping pressure increment and fracturing pressure reference value. 摘要为了给压裂施工提供合理的泵压增量及地层破裂压力参考值，需要预测压裂裂缝的高度。
- The stress corrosion mechanism in mixed solutions was studied based on the metallographic observations of scanning fracture shapes and crack extension direction. 根据扫描断口形貌和裂纹扩展途径的金相观察,还探讨了在混合溶液中的应力腐蚀机制。
- But hydraulic fracturing can also produce debate and anger over the risk of groundwater pollution. 但是，水力压裂也可导致对地下水污染风险的争议以及愤怒。
- Fracturing pressure in formations was the basic data for designing mud weight,well profile and hydraulic fracturing. 地层破裂压力是钻井液密度确定、井身结构和压裂设计施工的基础数据。
- Then an equation for estimating gas productivity of a hydraulic fractured well with various fracture lengths and conductivities (finite and infinite conductivity) were obtained. 将计算结果与现场某气井压裂后产量相比,两者吻合程度较好。该计算方法简单易行,便于现场应用。
- The hydraulic fractures crossing the salutatory barrier need a lot of energy accumulation, which can lead to a notable fluctuation of pressure curve. 水力裂缝穿过突变体需要比较大的能量积累，泵压会有显著波动。
- By using the well logging data, formation breakdown test or hydraulic fracturing test, the minimal horizontal main stress can be measured accurately. 借助已钻井的测井资料、采用钻井地破试验或水力压裂试验法可较精确地测定最小水平主地应力；
