Prediction method for volcanic rock oil reservoir productivity

A prediction method and technology of volcanic rock, which is applied in the direction of earthwork drilling and production, wellbore/well components, etc., can solve the problems of poor productivity prediction effect of volcanic rock reservoirs, and achieve high precision results
CN104695950AActive Publication Date: 2015-06-10BC P INC CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BC P INC CHINA NAT PETROLEUM CORP
Publication Date
2015-06-10

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Abstract

The invention relates to the technical field of oil reservoir productivity prediction, in particular to a prediction method for volcanic rock oil reservoir productivity. The prediction method comprises the following steps: step one, collecting the oil reservoir basic parameters of oil reservoirs or similar oil reservoirs of tested oil wells in target blocks, including individual well productivity Q, perforation reservoir thickness h, crude oil volume factor B0, comprehensive skin factor s, perforation productivity ratio PR, starting pressure gradient lambda, after-pressing well testing permeability Ks, formation pressure pe, flowing pressure pw, wellbore radius rw, fluid viscosity u, and fracturing fracture length, wherein the unit of the after-pressing well testing permeability Ks is mD, the units of the formation pressure Pe and the flowing pressure Pw are MPa, the unit of the wellbore radius rw is m, and the unit of the fluid viscosity u is MPa*s. Compared with an existing analogy method, the prediction method is more targeted, and the precision is higher, the precision can be improved to 60% above through the method disclosed by the invention, and a good method is provided for exploration oil testing, layer selection and the like.
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Description

Technical field

[0001] The invention relates to the technical field of oil reservoir productivity prediction, and is a volcanic rock reservoir productivity prediction method. Background technique

[0002] With the deepening of oil and gas exploration, the exploration field will face more volcanic reservoirs. Their productivity prediction directly affects the oil and gas yield of drilling. How to improve the accuracy of oil and gas yield through productivity prediction has become an urgent technical problem to be solved. Although there are many methods for reservoir evaluation, there are few studies on comprehensive systematic evaluation methods for volcanic rock complex reservoir conditions. With the continuous deepening of volcanic reservoir development, how to comprehensively use oil well logging, analysis and testing and well test analysis techniques to predict the productivity of volcanic reservoirs has attracted more and more attention, which is directly related to the level...

Claims

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