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Established in 2001, Puyang Zhong Yuan Restar Petroleum Equipment Co.,Ltd, “RSD” for short, is Henan’s high-tech enterprise with intellectual property advantages and independent legal person qualification. With registered capital of RMB 50 million, the Company has two subsidiaries-Henan Restar Separation Equipment Technology Co., Ltd We are mainly specialized in R&D, production and service of various intelligent separation and control systems in oil&gas drilling,engineering environmental protection and mining industries.We always take the lead in Chinese market shares of drilling fluid shale shaker for many years. Our products have been exported more than 20 countries and always extensively praised by customers. We are Class I network supplier of Sinopec,CNPC and CNOOC and registered supplier of ONGC, OIL India,KOC. High quality and international standard products make us gain many Large-scale drilling fluids recycling systems for Saudi Aramco and Gazprom projects.

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Fracturing flowback fluid in Tarim Oilfield

CN111535792A - Shale gas well flowback rate prediction ...

The invention relates to a shale gas well ,flowback rate, prediction method, belonging to the field of oil and gas field development; the method solves the problems that the existing shale gas well ,flowback rate, prediction method is few, part of methods are complex in ,calculation,, and the popularization is not strong; the technical scheme is as follows: firstly, correcting a shale two-phase ...

Study of Hydraulic Fracturing Real-time Evaluation Technology

Dali Guo 1, Lei Xu 1, Xiaohui Zeng 2, Xijun Ke 1 and Bo Tao 1. 1 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, School of Sciences, Southwest Petroleum University, Chengdu, Sichuan, 610500, China; 2 School of Petroleum Engineering, Southwest Petroleum University, Chengdu, Sichuan, 610500, China. Received: March 31, 2014. Revised: July 18, 2014.

The Calculation of Coal Rock Fracture Conductivity with ...

By the definition of fracture diversion capacity, the fracture conductivity of coal rock KW is. With ( 8) ~ ( 11) and ( 20) ~ ( 23) substituted into the above ,formula,, a model for calculating the fracture conductivity of coal rock considering the factors of proppant embedment and deformation in Model 4-1 is given.

Calculation of proppant-carrying flow in supercritical ...

1/7/2018, · The proppant-carrying flow of the SC-CO 2 ,fracturing fluid, can be divided into four parts: the filter loss coefficient ,calculation,, the ,calculation, of the fracture characteristic parameters and the temperature–pressure field, the proppant settlement velocity ,calculation,, and the proppant embankment ,calculation,.

1. Introduction - Hindawi

Multistage hydraulic ,fracturing, is a key technique for the effective exploitation of tight reservoirs. In the process of multistage hydraulic ,fracturing,, a large amount ,of fracturing fluid, is injected into the formation. However, field data show that the ,flowback rate, of the ,fracturing fluid, after ,fracturing, is generally no higher than 30% [1].

New Method for Quantitative Prediction of Liquid Flowback ...

Figure 2. Schematic diagram of liquid ,flowback,. Displacement pressure is Δ Pg(g=1,2,3) and capillary pressure is Pck(k=1,2,3,4) .What’s more, Δ P1 < Δ P2 < Δ P3 and Pc1 < Pc2 < Pc3 < Pc4 (a) saturated state; (b) displacement pressure is Δ P1; (c) displacement pressure is Δ P2; and (d) displacement pressure is Δ P3.

(PDF) Computer simulation of hydraulic fractures | Jean ...

The conversion ,formula, between concentration in ppa and volumetric concentration c is (footnote continued) c ppa ¼ ðc=ð1 À cÞÞG s r w , where G s is the proppant solid's specific gravity, and r w is the water density in pounds per gallon (r w ' 8:34 lb=gal). 5 In reality, part of the gel fraction of the ,fluid,, plus the ,fluid, trapped in the interstitial pores of the proppant pack remains ...

Investigation of a critical choke during hydraulic ...

During the course of fracturing fluid flowback, the fracturing fluid loss volume, V l, will change with bottom hole pressure P f. When the time is t n, the bottom hole pressure P f from t 1 to t n−1 is calculated. Therefore, V l n is the function of P n f.

Search Injection Rate: Fracturing fluids and additives | SPE

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Comparison of analytical models for hydraulic fracture ...

The ,calculation formula, for the fracture conductivity is as follows: $$ {F}_{\mathrm{RCD}}=\frac{74.8{f}_1\left({f}_1-0.74\right)\left(D{f}_1-{D}_1{f}_2-\frac{2{D}_2p}{E_2}\right)}{0.5{f_1}^2+1}{D_1}^2 $$

Fluids | Free Full-Text | Discrete Element Simulation of ...

During the fluid flow calculation, the increment of fluid pressure (∆ P) in a reservoir is computed from the bulk modulus of fluid (K f), the volume of the domain (V d), the sum of the flow volume for one time step (∆ t), and the volume change of the domain due to mechanical loading according to Equation (12) :

Fault activation by hydraulic fracturing in western Canada ...

This event occurred during ,flowback,, a postinjection process during which ,fracturing fluid, is partially recovered in a controlled manner . This timing invites speculation that the earthquake was triggered by ,fluid, withdrawal; however, only ~7% of the injected fluids at well 1 flowed back to the wellhead, an unusually low recovery level compared with typical values of ~50% in other parts of western Canada ( …

Experimental Study of Fracturing Fluid Retention in Rough ...

However, field data show that the ,flowback rate, of the ,fracturing fluid, after ,fracturing, is generally no higher than 30% . For conventional reservoir hydraulic ,fracturing,, the ,flowback rate, should be higher to reduce the damage caused by the external fluids to the reservoir [ 2 – 4 ].

Comparison of analytical models for hydraulic fracture ...

The calculation formula for the fracture conductivity is as follows: $$ {F}_{\mathrm{RCD}}=\frac{74.8{f}_1\left({f}_1-0.74\right)\left(D{f}_1-{D}_1{f}_2-\frac{2{D}_2p}{E_2}\right)}{0.5{f_1}^2+1}{D_1}^2 $$

Fracturing-Fluid Flowback Simulation with Consideration of ...

The mass balance equation for the carrying-fluid flowback in primary fractures is expressed below (1) where ∂[(1 – c F)ρ w]/∂t stands for the mass variation in F, including the carrying-fluid density ρ w, the residual volume fraction (1 – c F), and change with flowback time t, while ∇[(1 – c F)ρ w v w F] stands for the carrying-fluid flux term in F, which is related with carrying-fluid flowback velocity ν w F.

Selection of Diameter of Spherical Tagin Fracturing ...

rate, of fracture ,fluid, at well head. The following are force ... ,Fracturing fluid flowback, is an important part of hydraulic ,fracturing, technique, ... and the ,formula, of air drag showing as 2 1 2 f C Sv , we can think that the thrustapply to tag from ,fracturing fluid

Selection of Diameter of Spherical Tagin Fracturing ...

rate, of fracture ,fluid, at well head. The following are force ... ,Fracturing fluid flowback, is an important part of hydraulic ,fracturing, technique, ... and the ,formula, of air drag showing as 2 1 2 f C Sv , we can think that the thrustapply to tag from ,fracturing fluid

Optimization on fracturing fluid flowback model after ...

When the permeability increases from 1mD to 5mD, the ,flowback rate of fracturing fluid, and proppant settlement degree are reduced by 12.3% and 69.8% respectively. When the porosity increases from 9% to 36%, the proppant settlement degree fall by 25.2%.

The Calculation of Coal Rock Fracture Conductivity with ...

By the definition of fracture diversion capacity, the fracture conductivity of coal rock KW is. With ( 8) ~ ( 11) and ( 20) ~ ( 23) substituted into the above ,formula,, a model for calculating the fracture conductivity of coal rock considering the factors of proppant embedment and deformation in Model 4-1 is given.

Fluids | Free Full-Text | Discrete Element Simulation of ...

During the ,fluid, flow ,calculation,, the increment of ,fluid, pressure (∆ P) in a reservoir is computed from the bulk modulus of ,fluid, (K f), the volume of the domain (V d), the sum of the flow volume for one time step (∆ t), and the volume change of the domain due to mechanical loading according to Equation (12) :

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