A method for diagnosing the number of multi-cluster fractures in a horizontal well

Abstract

The invention discloses a method for diagnosing the number of multi-cluster fracturing fractures in a section of a horizontal well. The method is as follows: the first step: collecting the basic data of the fracturing wells in the block with the same reservoir development characteristics as the horizontal well; the second Step 2: Establish a fracture pressure calculation model based on well logging data; Step 3: Use the fracture pressure prediction model obtained in the second step to predict the fracture pressure of a section of multi-cluster fracturing points; Step 4: Test the fracturing pressure Pressure drop data analysis and judgment of fracture closure time, closure pressure and fracture leakage characteristic information; Step 5: Use PT or Stimplan fracturing software to conduct G function analysis on the construction data collected from test fracturing; Step 6: Judgment The opening and extension of fractures in one section of multi-cluster fracturing can be used to guide the design optimization of other fracturing sections. Beneficial effects: the number of fractures opened by multi-cluster fracturing in a section of a horizontal well can be diagnosed in real time and effectively, so as to ensure the effectiveness of multi-cluster in a section and ensure the stimulation effect of the horizontal well.

Description

technical field [0001] The invention relates to a method for diagnosing the number of fracturing fractures, in particular to a method for diagnosing the number of multi-cluster fracturing fractures in a section of a horizontal well. Background technique [0002] At present, in the development process of unconventional gas reservoirs such as tight oil and gas and shale gas, horizontal well fracturing is a necessary production measure. Staged fracturing of horizontal wells is of great significance in increasing recoverable reserves, improving single well productivity and stable production time. With the development of petroleum equipment technology, the staged fracturing process of horizontal wells has gradually developed from the initial one-stage fracturing to two-stage fracturing, and one-stage multi-stage fracturing. One-stage multi-cluster fracturing can effectively reduce the number of fracturing stages on the premise of ensuring the volume of reservoir stimulation, red...

AI Technical Summary

Problems solved by technology

On the one hand, the cost of microseismic monitoring is expensive, and it is impossible to monitor every well. On the other hand, the data obtained by monitoring needs to be processed for a period of time, and it cannot guide the construction on site in real time. These limit the popularization and application of fracture monitoring technology.

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