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Li B.,Drilling and Production Technology Research Institute
Advanced Materials Research | Year: 2014

Layer steam injection is a most effective method in heavy oil recovery. Layer Steam Injection Simulation Test System is a simulation test system of layer steam injection. It had been independent developed based on technologies such as PC, modern sensor, automatic control etc., so that to solve experimental problems like doing layer steam injection, selecting and testing downhole tools exactly. The system can offer no less than 320 °C and 17MPa experimental environment. The system use heat transfer oil instead of high temperature and high pressure steam to do the experiment, which is a new way to do the similar experiment; the measurement and control system were designed and developed to control the whole system and measure the flow, pressure and temperature. It is determined that system can meet the design in advance through analysis of experimental data. © (2014) Trans Tech Publications, Switzerland. Source


Liu E.H.,Drilling and Production Technology Research Institute
Applied Mechanics and Materials | Year: 2014

High temperature gel plugging agent was constituted of HG modified resin, cross-linking agent, HS solid particles. In this paper, the factors such as modified resin, cross-linking agent, salinity and HS solid particles, temperature on gel were studied. And the function of agent high temperature gel plugging agent was tested. High temperature gel plugging agent has some characters. For example, it can form gel at a low temperature, and isn’t affected by salinity. It has high strength, and its forming gel time was adjustable. The agent was used in 42 wells, which steam injection pressure were increased largely. The plane and vertical contradictions were improved. The wells product more oil. High temperature gel plugging agent improve steam effect. The application results show that the high temperature gel plugging agent was suitable for water blocking in multiple rounds of steam injection. © (2014) Trans Tech Publications, Switzerland. Source


Liu R.W.,Drilling and Production Technology Research Institute
Applied Mechanics and Materials | Year: 2014

The experiments on microscopic displacement of flowing gel flooding after water and polymer flooding were carried out with the sand-packing model. The experimental results of the microscopic displacement indicate that oil recovery can be further enhanced using flowing gel after water and polymer flooding, and the enhanced range is about 15 percent. Flowing gel flows preferentially through the largerchannels occupied previously by injected water in flowing gel injection process, improves sweep efficiency of injected water. Because of its viscoelastic, it can be stretched through the narrow pore deformation. The strength was reduced by the shear, dilution, and it would be driven out by the water from the pores and continue to move forward. Therefore, the main function of flowing gel is flooding, while profile modification is temporary effect. Flowing gel flooding can significantly reduce the cost of chemicals. From the development of tertiary oil recovery trend, flowing gel flooding is a technology that is being developed and perfected, with high technology- economic feasibility. © (2014) Trans Tech Publications, Switzerland. Source


Liu E.H.,Drilling and Production Technology Research Institute
Applied Mechanics and Materials | Year: 2014

Heavy oil in Liaohe oilfield is buried in more than 1000 meters, and the steam injection temperature is around 350°C. Through the experiment on surfactant product, high temperature foam surface active agent was developed, which was based on high carbon chain alkyl benzene sulfonate or alkyl toluene sulfonate, and auxiliary solvent and stabilizer were added. High temperature foam surface active agent can meet the needs of steam foam profile control technology. © (2014) Trans Tech Publications, Switzerland. Source


Xu H.Y.,Drilling and Production Technology Research Institute
Applied Mechanics and Materials | Year: 2014

To reduce environmental pollution caused by waste drilling fluid, Liaohe Oilfield takes methods of sewage pit seepage control and waste drilling solidification disposal. Firstly, different impermeable material comparation has been taken, as a result, high-density polyethylene geomembrane (HDPE) was choosn as the impermeable material for sewage pit.which has features of good seepage control, good chemical stability, low price,non-toxic and environment friendly. According to features of five different landforms in Liaohe Oilfield, corresponding seepage control programs are developed. impermeable material, implementation and measurement of sewage pit are unified and standardized. which prevent contamination of underground water caused by waste drilling fluid effectively. Finally, curing treatment of the waste drilling fluid is carried out, forming a system engineering to meet the needs of environment protection and costs control. © (2014) Trans Tech Publications, Switzerland. Source

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