Horizontal well profile control and flooding technology
A horizontal well and process technology, applied in wellbore/well components, production fluid, earthwork drilling and production, etc., can solve the problems of high water content in oil wells, achieve the effects of reducing water content, improving oil recovery, and increasing volume
Active Publication Date: 2018-11-16
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
[0005] In order to solve the above-mentioned technical problems, the present invention provides a horizontal well control and displacement process, which solves the problem of high water content in the oil well caused by the injected water creeping in along the dominant seepage strip in the horizontal section during the injection and production process of the horizontal well. question
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[0064] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that in the control and drive process method of the embodiment of the present invention, the physical meanings referred to by the parameter symbols described in the preceding and following texts are the same. The on-site process parameters and production dynamic data of the well group are collected by the on-site test device, which can be viewed and called in real time.
[0065] This embodiment provides a new process suitable for offshore horizontal well control and flooding, wherein, image 3 It is a schematic flow chart of the horizontal well control and flooding process according to the embodiment of the present invention. like image 3 As shown, the specific control and flooding process includes:
[0066] Step 1: According to...
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The invention provides a horizontal well profile control and flooding technology. The horizontal well profile control and flooding technology comprises the steps that step 1, analysis is carried out and a water channeling type and a measure purpose are determined according to the geological reservoir parameters of a target well group and combined with the remaining oil distribution of a horizontalwell group and injection and production characteristics; step 2, the diameter of a pore throat is calculated, and a matched profile control and flooding agent is selected; step 3, an artificial coreis selected, a core flooding experiment is carried out by using the profile control and flooding agent selected in the step 2, the corresponding drag coefficient and stemming ratio of the profile control and flooding agent at different injection concentrations are determined, and then the final selected injection concentration range and the final selected mode of the profile control and flooding agent are determined; step 4, the artificial core is selected, and the final selected profile control and flooding agent is used for determining the increasing rate of the recovery ratio under different injected PV numbers so as to determine the final selected PV number; step 5, the total injection amount of the profile control and flooding agent is calculated according to the final selected PV number; and step 6, slug combination and the injection parameters of the profile control and flooding agent in each slug are designed by combining the result of the step 1 and the total injection amountof the profile control and flooding agent.
Description
technical field [0001] The invention relates to the technical field of reservoir water injection development, and more specifically relates to a horizontal well control and flooding process. Background technique [0002] After long-term water injection development in the Bohai Oilfield, due to factors such as strong reservoir heterogeneity and high oil-water mobility ratio, the water cut of some oil wells rises rapidly and the production declines seriously. According to statistics, at present, wells with a water cut higher than 60% account for about 47.5% of the total oil wells in the Bohai Oilfield, and horizontal wells with a water cut higher than 80% account for 39.9% of the total oil wells. The entire Bohai Oilfield is stable. It is imminent to control oil and water and improve the water flooding development effect of horizontal wells. [0003] like Figure 1a As shown, the conventional well pattern is that one well penetrates multiple layers, the main contradiction com...
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IPC IPC(8): E21B43/01E21B43/20E21B43/22
CPCE21B43/01E21B43/16E21B43/20
Inventor 李翔贾永康鞠野刘丰钢徐国瑞庞长廷
Owner CHINA NAT OFFSHORE OIL CORP