压裂

The model mainly includes: the continuity equation of the fracturing fluid flowing in the fracture, pressure drop equation, fracture width equation and height equation.

该模型主要包括：压裂液在缝中流动的连续性方程、压降方程、裂缝宽度方程和及高度方程。

Inadequateness leads to thin artificial barrier, which cannot form a low permeable or impermeable artificial barrier, which just cause lower differential pressure, this cannot control the extension on the height effectively.Moreover, because the artificial barrier cannot achieve the function of the height controlled, finally make the projection less efficiency, even could be defeated comes to an end.

过少则人工隔层过薄，不能形成一个低渗透或不渗透的人工遮挡层，只能在裂缝垂直方向上形成较小的压降，从而不能更有效的遏制裂缝在纵向上延伸；另外，由于遮挡层起不到控制缝高的作用，降低了压裂效率，最终施工效果不明显，甚至会以失败告终。

Be in Mexico deeper well paragraph, between hole pressure and fracture gradient pressing difference is very small probably.

在墨西哥较深的井段，孔隙压力和压裂梯度之间的压差或许是非常小。

Combining the fluid mechanics in porous medium and the geometry, the author considers the artificial barrier as a filter cake, research on the vadose rule on the condition of the coercibility and the non-Newtonian fluid flow, establish the formula of artificial barrier pressure drop and thickness, probe the formula of the thickness of artificial barrier for the pressure in the fracture,the coercibility, the smallest stress of barrier and the rheological property of fracturing fluid.

结合渗流力学和几何学，将人工隔层视为滤饼，在对人工隔层中渗流规律的研究中考虑了流体的非牛顿性和人工隔层的可压缩性，建立隔离层压降与厚度之间的关系式，探索人工隔层厚度与缝内压力、人工隔层可压缩性、上下隔层最小主应力、压裂液流变性等之间的关系。

When a horizontal well is transversally fractured with multiple stages, initial crack can induce the secondary change of the wellbore stress, producing the induced stress ield which has an inluence on subsequent crack initiation.

水平井分段压裂时，形成的初始裂缝会诱发井筒周围应力分布二次改变，产生诱导应力场。诱导应力场将会对后续裂缝起裂产生影响。

The tuffaceous volcanic reservoir s of Xing'anling group in Hailaer Basin, Daqing Oilfield, includes andesite-rhyolite tuffaceous, andesite tuffaceous and trachy-rhyolite tuffaceous volcanic rocks.

针对这些特点，通过岩石水理特性实验和岩石力学特征研究，提出了以下解决措施：①凝灰质火山岩储层粘土含量高时，应提高压裂液的防膨胀性能，大排量施工，增加裂缝净压力；②碱性和偏碱性凝灰质储层，应研究使用低滤失压裂液，降低滤失量，同时提高压裂液的防膨胀性能；③凝灰质储层塑性较强时，应尽量提高施工排量。

Applied overlay principle discloses intention at the complex load of break of grease wall of a well for individual and simple load, through set and time relevant aeriform pressure distributings function, rupture according to flexibility of stretch and mechanical, line condition of tie of stress of the upland after perforation of well of grease of mechanical and academic derivation plays factor of intensity of interstitial and most advanced stress, got deflagrating patulous condition is cracked since terrane of aeriform fracture wall of a well, the aeriform pressure gradient that this condition can follow time change inside reflective break is right the influence of interstitial configuration.

应用叠加原理将功能于油水井壁裂缝的复杂载荷分解为单个简单载荷，通过设定和时间相关的气体压力分布函数，根据弹性力学、线弹性断裂力学理论推导油水井射孔后高地应力约束条件下裂缝尖端应力强度因子，得到了爆燃气体压裂井壁岩层起裂扩展条件，该条件可以反映裂缝内随时间变化的气体压力梯度对裂缝形态的影响。

It is important for fracturing design and operation to determine hydraulic fracturing initiation pressure and mode.

确定水力裂缝在井壁处起裂的压力和方式，对水力压裂设计和施工有重要的作用。

Analyzed the structure, the work process and the design requirement of the compulsory roller installment, designed a kind of compaction device, which improved the cutting quality greatly for that it can not only crack the knurls and the corn spikes, but also guarantee unobstructed feeding.

设计了一种浮动喂入辊压紧结构，试验证明该压紧机构既能将茎秆的硬节和果穗压裂，又能保证喂入通畅、不堵塞，大大地提高了饲料的切碎质量。

Study shows that compaction and cementation can play a destructive role in Suining formation reservoir,while dissolution and fracturing can play a constructive role in that.The main facies of Suining formation are ferruginous-shale film,anhydrite,dolomite and calcite.The micro-fracture and grain-edged fracture mainly resulted from compaction fracturing,compaction slipping and tectonic dynamic force greatly improve the reservoir permeability.

研究表明：①对遂宁组储层起破坏作用的是压实作用、胶结作用和交代作用，而溶蚀作用、压裂作用则对储层起到建设性作用；②遂宁组最主要的成岩相组合为铁泥膜－硬石膏－白云石－方解石成岩相；③由压实破裂、压实滑动和构造动力形成的微裂缝、粒缘缝有效改善了储层的渗透性。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。