Post-fracture flow-back tracking detecting method for horizontal well

A detection method and horizontal well technology, which is applied in the direction of earthwork drilling, wellbore/well components, production fluid, etc. It can solve the problem of inability to determine whether the liquid at target point B returns to the wellbore or not, and whether the tracer concentration is accurate Filling, insufficient stability and reliability, etc., to achieve the effect of stable detection results, strong practicability, and reliable filling
CN106401552AInactive Publication Date: 2017-02-15CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2017-02-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a post-fracture flow-back tracking detecting method for a horizontal well. The post-fracture flow-back tracking detecting method comprises the following steps: step 1, preparing a tracking fracturing fluid; step 2, carrying out fracturing and flow-back test on the tracking fracturing fluid in a straight well, recording fracturing construction parameters and flow-back parameters, and sampling a tracking flow-back liquid according to certain time interval, separately detecting tacking concentration, acquired in different time periods, in each sample, and obtaining datum data that tracking concentration changes along with time in the tracking flow-back liquid; and step 3, adopting the tracking fracturing liquid with the same tracking concentration in the step 2 to carry out fracturing construction on the horizontal well, recording the construction parameters and the flow-back parameters and sampling the tracking flow-back liquid according to certain interval time; respectively detecting tracking concentration, acquired in different time periods, in each sample, and calculating to obtain practical flow-back amount of the tracking fracturing liquid in an existing time period of the detected sample; and calculating to obtain a flow-back rate, reversed out by the horizontal well in the existing time period, at a tracing stage of the detected sample.
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Description

technical field

[0001] The invention relates to post-fracture evaluation technology of oil and gas wells, in particular to a flowback trace detection method after horizontal well fracturing. Background technique

[0002] As an important technical measure to increase reserves and production of oil and gas wells, fracturing technology is playing an increasingly important role in the exploration and development of oil and gas fields, and the fracturing effect depends to a large extent on the knowledge and understanding of formation conditions. How to recognize and understand formation conditions requires post-fracture evaluation of oil and gas wells.

[0003] At present, the post-fracture evaluation of vertical wells is mainly realized through tracer technology. However, due to the particularity of the well conditions and the existing multi-stage staged fracturing technology measures for horizontal wells, it is impossible to simply follow the tracer technology of vertical well...

Claims

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