A Method for Identifying Ineffective Circulation in Oilfield Injection-production Relationship

A technology of ineffective circulation and identification methods, applied in earth-moving drilling, surveying, wellbore/well components, etc., can solve problems such as reducing water injection efficiency

Active Publication Date: 2020-04-17
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0006] The invalid circulation field causes the invalid circulation of the injected water, which greatly reduces the water injection efficiency

Method used

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  • A Method for Identifying Ineffective Circulation in Oilfield Injection-production Relationship
  • A Method for Identifying Ineffective Circulation in Oilfield Injection-production Relationship
  • A Method for Identifying Ineffective Circulation in Oilfield Injection-production Relationship

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples, but the present invention is not limited to these examples.

[0041] The identification method of invalid circulation in the oilfield injection-production relationship of the present invention is based on the combination of oilfield geological static data and production dynamic data, and gives an invalid circulation scoring standard for each pair of injection-production relationship wells in the block, and finally uses the score The form illustrates the possibility of invalid circulation in the injection-production relationship. It specifically relates to the flow of the identification method of invalid circulation in the injection-production relationship, including static identification, logging curve identification, and dynamic identification...

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Abstract

The invention discloses a recognition method for futile cycle in an oilfield injection-production relation. The recognition method is characterized by comprising the following steps: static recognition of futile cycle, recognition of a well logging curve, and dynamic recognition of futile cycle. The step of static recognition of the futile cycle further comprises the following substeps: selection of injection-production well groups and selection of sedimentary facies types. The step of recognition of the well logging curve further comprises the following substeps: division of thick and thin oil layers, selection of water-out interpretation results, and recognition of the well logging curve. In the method, various data including fine geology research achievements, profile testing, well logging interpretation and the like are comprehensively utilized, distribution conditions of futile cycle fields are clear and definite, field tests are carried out, good effects are achieved, and reliable basis is provided for followed-up water-flooding development.

Description

technical field [0001] The invention relates to an identification method in geological engineering of an oil field, in particular to an identification method for an invalid cycle in an oil field injection-production relationship. Background technique [0002] Due to the difference in permeability and the gravitational differentiation of oil and water in domestic onshore sandstone oilfields, the injected water preferentially rushes toward the oil well along the bottom of the channel sandstone main belt during oilfield development, and under the condition of long-term water injection erosion, oil, The water wells are interconnected with high-permeability and strong water-washing large pores. [0003] After the formation of large pores, the injected water mainly flows along the large pores, which can no longer serve the purpose of driving the remaining oil. The concept of injection-production effectiveness is used to describe the utilization efficiency of injected water. If t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00
CPCE21B47/00
Inventor 佟星刘阳张天石曾鹏于海斌
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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