Deep profile controlling method
A technology for deep profile control and profile control, applied in the field of deep profile control, can solve problems such as inapplicability, and achieve the effect of simple implementation and low cost
Inactive Publication Date: 2011-08-10
CHINA PETROLEUM & CHEM CORP +1
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Therefore, the new profile control agents are not suitable for plugging large pores and high permeability strips
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[0024] Continental oil layers are the main oil layers in my country, and one block has multiple layers is one of its characteristics. Water injection development is the main development method of oilfields in my country. In the initial stage of oilfield development, the method of combined injection and production of all wells is generally used for production, that is, the development of a set of injection and production well patterns. In this development mode, the interlayer contradiction caused by the inherent heterogeneity of the oil layer itself, that is, the interlayer interference, that is, due to the different permeability of the oil layer, when the whole well is flooded with water, the water absorption of the formation with high permeability will decrease. larger. It has a great influence on the development effect. With the advancement of technology, subdivision stratum layered mining has been applied in the field. Considering the development of reservoirs, interlaye...
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The invention discloses a deep profile controlling method. The method is characterized by comprising the steps of dividing multiple oil layers of the same oil field block of a continental oil layer into a plurality of layer series, wherein each layer series has a respective flooding well network, and all the flooding well networks do not interfere with each other; passing water wells of the other layer series are found out as plugging agent injection wells between oil-water wells in a well group to be controlled rather than injecting plugging agents into water wells to be controlled, wherein the layer series of the passing water wells are positioned above or below the layer series of the well group to be controlled; and the passing water wells of the other layer series for injecting the plugging agents are returned to place the plugging agents between oil-water wells of a target oil layer, therefore, a purpose of deep profile control is achieved. The deep profile controlling method disclosed by the invention has the advantages of broad popularization and application prospects and simpleness of field implementation; moreover, just by using the current conventional technology, the deep profile control purpose can be achieved with comparatively low cost.
Description
technical field [0001] The invention relates to a method for increasing oil recovery in oil reservoirs, in particular to a deep profile control method. Background technique [0002] The profile control technology is to inject plugging agent into the water injection well to realize the plugging of the water flow channel, so as to improve the plane, interlayer and intralayer contradictions of the oil layer, make the water absorption profile of the water injection well more balanced, expand the swept volume of water flooding, It is a process technology to improve the effect of water flooding development. Both laboratory research and field practice have shown that implementing profile control in water injection wells can achieve the purpose of reducing water and increasing oil production, and is currently one of the leading technologies for controlling water and stabilizing oil in the high water-cut development period of water-flooding sandstone reservoirs. In sandstone reservo...
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Inventor 汪庐山张光焰刘承杰靳彦欣吕西辉关悦陈玉丽付琛王海英尹相文
Owner CHINA PETROLEUM & CHEM CORP