Method for rapidly and quantitatively evaluating improvement of liquid extraction of oil well to development effect
A technology of development effect and quantitative evaluation, which is applied in the directions of surveying, earthwork drilling and production, wellbore/well components, etc., can solve the problems of incomplete evaluation of liquid extraction effect, achieve the improvement of liquid production profile, wide application and strong operability Effect
Pending Publication Date: 2020-10-23
CHINA NAT OFFSHORE OIL CORP +1
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[0004] In order to solve the problems in the prior art, the present invention provides a method for quickly and quantitatively evaluating the effect of oil well extraction to improve development, and solves the problem of incomplete evaluation of the extraction effect in the prior art
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Embodiment 1
[0060] Example 1: Using a method and chart for rapid and quantitative evaluation of oil well extraction to improve the development effect of the present invention, taking the E3-5 well in Jinzhou 9-3 Oilfield, Bohai Sea as an example, to illustrate the rapid and quantitative evaluation of oil well extraction to improve development effect . like Figure 7 to Figure 11 Shown, a kind of rapid quantitative evaluation oil well extracting liquid of the present invention improves the method for development effect, mainly comprises the following steps:
[0061] The first step is to collect static data of the target block. The effective thickness H data of the production interval of Well E3-5 in Jinzhou 9-3 Oilfield was collected. According to the different well types, the directional well collects the effective thickness ( Figure 7 ); see column 2 of Table 2 for an example.
[0062] Table 2 Example table of basic data collection / processing before liquid extraction in Well E3-5 of...
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The invention discloses a method for rapidly and quantitatively evaluating improvement of liquid extraction of an oil well to the development effect. The method comprises the steps that firstly, static data collection of a target block is achieved; secondly, liquid production section data collection of the target block is achieved; thirdly, the oil production intensity of production layer segmentsof the oil well is calculated and ranked; fourthly, the oil production feature curve of the production layer segments of the oil well is drawn; fifthly, the oil production heterogeneous coefficient of the production layer segments of the oil well is calculated; sixthly, the liquid extraction development effect improvement coefficient is calculated; and seventhly, the liquid extraction developmenteffect improvement grade plate is drawn. By means of the method, the problem that whether the final recovery rate is improved through rapidly evaluation on oil well liquid extraction or not is solved, scheme design and effect evaluation and study of the liquid extraction effect in the oil field development process are facilitated, the method is scientific and reasonable, and the effect is ideal.
Description
technical field [0001] The invention relates to a method for rapidly and quantitatively evaluating the effect of oil well extraction to improve development. Background technique [0002] There are large reserves of heavy oil in the Bohai Sea, and the heavy oil less than 350mPa·s is often developed by conventional cold recovery and chemical flooding. For heavy oil cold recovery, the medium-high water cut stage is the main production stage, and liquid extraction from heavy oil reservoirs in the later stage is the main way to stabilize production in heavy oil fields. In 2018, the Bohai Oilfield’s liquid extraction workload accounted for 1 / 3 of the annual workload, and the oil increase by liquid extraction accounted for more than 1 / 3 of all production increase measures. It can be seen that liquid extraction is very important for the stable production of heavy oil reservoirs. However, for the research on liquid extraction, currently, it is mainly focused on discussing the mater...
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IPC IPC(8): E21B47/00G06Q50/02
CPCE21B47/00G06Q50/02
Inventor 葛丽珍刘宗宾刘东冯海潮祝晓林朱琴杨志成陈勇军张占女王永平
Owner CHINA NAT OFFSHORE OIL CORP