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Successful applications in five wells show that polyalcohol drilling fluids can decrease drilling cycle, improve penetration rate, reduce downhole problems and accidents and be helpful to find producing layer but incre...

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On the contrary, the function of the positive defect is to make the depth of the well deeper.

而正缺陷的作用是讓勢井的深度較其它勢井要更深一些91视频国产美女裸体。

A test used to determine the open-flow potential and the rational flow regime of a production well.

為確定生產(chǎn)井無阻流量和選擇合理的井工作制度所進(jìn)行的測試。

The structure of potential wells and some properties of depth function of potential well are given.

給出了位勢井的結(jié)構(gòu)和位勢井深度函數(shù)的性質(zhì)不卡av在线播放。

The pressure gradient,as one of the most important parameters affecting design and operation of gas-lift well s,is the foundation of gas-lift well design.

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This article that focuses on the systematic and in-depth research in the current primal problem about abnormal burst pressure reservoir depress burst pressure has procured following main fruits:1 It forms the method which could obtain massive vertical static state mechanics parameters.2 In a foundation of acquisition of rock mechanics parameters,apply bent lamella that as mechanical model along with characteristic of actual geologic characteristics to analysis curvature for anticlinal strcture, get homologous tectonic stress value throug relation between the curvature and stress and different principal curvature in anticlinal structure,consequently set up laminational stress model for anticline reservoir. The block lamination for existed fracturing date has formed method of setting up mechanical model of lamination terrestrial stress by abtaining the block tectonic stress coefficients which are got by complex utilization test, laboratory test and fracturing date playback.3 Analysesing the main reason which lead to high burst pressure by considering the characteristic of reservoir geology,reservoir,and rock mechanics and reservoir damage,etc.Establishing burst pressure quantitative prediction model which provide gist for depressing construction risk and optimizing construction craft under the condition of open hole completion ,gun-perforated completion and damaged reservoir.4 Provding theoretical basis for interpreting acidification pretreatment which could depress busrt pressure by finding the relation between the influencing factors and rock machanics parameters and analysing the factors that have effect on rock mechanics parameters. Expounding the mechanism of reaction of mixed monomineral and acid from the angle of microcosmic element, evaluating quantitatively acid sensilility of different kinds of mineral effectively, and determing the first-order reaction dynamical equation of each mineral.5 Revealing rock mechanics property chage as a result of acid flooding in different condition by sandstone traumata experiment in different temperatures which combined with rock mechanics triaxial stress experiment.6 Associating damage mechanics with sandstone acidizing, established sandstone damage mechanics model in the foundation of the recognition on the rock mechanics parametric variation which is caused by acid-rock reaction in both macroscopic view and microscopic view ,also demonstrated those processes and quantitative estimated the acid busrt pressure to direct the site operation.

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Based on the partial differential equation and superposition principle of linear systems, this paper describes the solution to the commingled multiwell well test model.

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The analysis of the acided-fracturing effect by the transient well test prove to be not all the reservoir that has not the high producibility, the reservoir damage is the dominating factor of the affecting acided-fracturing effect, and that the acided-fracturing...

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