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Sun L.-L.,China University of Petroleum - Beijing | Sun L.-L.,CMOE Key Laboratory of Petroleum Engineering | Hou J.-R.,China University of Petroleum - Beijing | Hou J.-R.,CMOE Key Laboratory of Petroleum Engineering | And 5 more authors.
Oilfield Chemistry | Year: 2011

Depressurization method is adopted in Sudan 3/7 oil field, and water injection is implemented with the decrease of the formation pressure. It is critical to avoid the formation damage caused by the injected water (IW). In this paper, based on indoor core simulation experiment, the influences of the injection rate and water quality and pressure, et al, on the formation of the Sudan 3/7 oil reservoir, was studied. The results showed that the injection rate, the size of the suspended particles and oil content are the main factors of formation damage. The standard of water injection was recommended as follows, the injection rate should be less than 2 ml/min, the salinity of the IW should be more than 5070 mg/L, the oil content of the IW should be less than 40 mg/L, the particle size of the suspension should be less than 1. 6 μm, and the formation pressure should be keep upon 11 MPa during exploring.

Xue Y.C.,CMOE Key Laboratory of Petroleum Engineering | Cheng L.S.,CMOE Key Laboratory of Petroleum Engineering
Advanced Materials Research | Year: 2013

Geological model controlled by sedimentary microfacies can not able to accurately reflect the actual seepage characteristic, How to apply the static flow units to the dynamic reservoir numerical simulation is the advancing edge of petroleum industry. The method of reservoir geological modeling controlled by flow units is proposed. Firstly, the 3D models of flow unit should be build, secondly, the 3D porosity and permeability model are established controlled by the model of flow unit, thirdly, the 3D fluids saturation model is calculated by Leverett J function based on porosity and permeability mode. Selecting different relative permeability curves according to different flow units in history matching. which realizes the dynamic (development geological) and static (reservoir engineering) combination. The oilfield examples shown that the velocity and precision of history matching can be significantly improved by using the method mentioned. © (2013) Trans Tech Publications, Switzerland.

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