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Hydrofracture fracture distribution optimization method of newly drilled horizontal well in water-flooding well pattern

A technology of hydraulic fracturing and optimization method, applied in wellbore/well components, design optimization/simulation, production of fluids, etc., can solve problems such as inability to communicate, reduce investment costs, increase contact area, and single-well production boosted effect

Active Publication Date: 2020-09-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When designing hydraulic fractures for such wells, it is necessary to maximize the production of remaining oil and not communicate with the formed waterline and surrounding old wells. However, there is no effective method and production practice at present. Therefore, it is urgent to focus on this type of infill Horizontal Wells Form a Reasonable Hydraulic Fracturing Fracture Design Method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment relates to a hydraulic fracturing optimization method for newly drilled horizontal wells in a water injection development well pattern, including the following steps:

[0049] S1, collect the drilling process data of the newly drilled horizontal well, the comprehensive logging results of the horizontal section and the core analysis data of the surrounding parameter well target interval;

[0050] S2, according to the drilling process of the newly drilled horizontal well collected in S1 and the comprehensive logging results of the horizontal section of the newly drilled horizontal well, determine the effective horizontal section stimulation length of the target interval, and then determine the hydraulic fracture layout method;

[0051] S3, according to the position of the waterline in the well pattern, the drilling overflow point and overflow volume collected during the drilling of the newly drilled horizontal well, and the artificial fractures of the surro...

Embodiment 2

[0056] On the basis of Embodiment 1, further, in the above-mentioned S1 step S1, the drilling process data of the newly drilled horizontal well, the comprehensive logging results of the horizontal section and the core analysis data of the surrounding parameter well target interval are collected, specifically including:

[0057] S101. During the drilling process of a newly drilled horizontal well, collect the length of the horizontal section after drilling, the overflow point and overflow volume drilled into the target layer, and record them in the drilling completion card;

[0058] S102. The comprehensive logging results of the horizontal section, including the permeability of the target layer, porosity, oil saturation, shale content, completion electrical logging parameters, and the dry section, high shale content section, and water-washed section length of horizontal section;

[0059] S103. The peripheral parameter wells include exploration wells, evaluation wells and skelet...

Embodiment 3

[0061] On the basis of the above-mentioned embodiments, further, the effective length of the horizontal section reconstruction in the step S2 refers to the sum of the lengths of the horizontal section between two adjacent overflow points or two waterlines, minus the length of the horizontal section in the logging results Horizontal section length of dry interval, high shale content interval, and washed interval.

[0062] Specifically, the lengths of the horizontal sections of the dry section, the high shale content section, and the washed section in the logging results are respectively obtained through the following steps:

[0063] S201. The length of the horizontal section of the dry interval can be directly read from the comprehensive logging chart;

[0064] S202. The interval with high shale content refers to the interval with shale content greater than 20% or the interval with natural gamma greater than 120API in the results of the comprehensive logging map. The horizontal...

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Abstract

The invention relates to a hydrofracture fracture distribution optimization method of a newly drilled horizontal well in a water-flooding well pattern. The hydrofracture fracture distribution optimization method aims at the situation that a newly drilled encrypting horizontal well does not have an effective and mature hydrofracture artificial fracture distribution method. According to the hydrofracture fracture distribution optimization method, the remaining oil of an old oilfield is fully utilized and does not communicate with a waterline and an old well, so that the remaining oil can be effectively utilized to a greater degree to obtain more industrial crude oil; in addition, communication with a formed waterline between water injection wells is avoided, and at the same time, energy supplementation of injected water is utilized to increase the single well production to the maximum, and the decreasing amplitude is reduced; and moreover, communication with the old well on the originalwell pattern condition can be avoided, disturbance to contribution of the old well to crude oil production is avoided, so that the integrated regulation and development effect of the oilfield are improved.

Description

technical field [0001] The invention relates to the field of oil production engineering, in particular to a hydraulic fracturing optimization method for newly drilled horizontal wells in a water injection development well network. Background technique [0002] The low-pressure (pressure coefficient is about 0.7), low-permeability (permeability<10×10) represented by Changqing Oilfield -3 um 2 ) oilfields, it is difficult to produce crude oil, and a water injection development area well pattern with water wells as the center and oil production distributed around is mainly formed. By fracturing oil production wells, oil flow channels with high conductivity are formed, and water wells are flooded to displace them, so as to obtain crude oil between oil wells and water wells to the greatest extent. From the current development practice, it is found that after long-term water injection (more than 20 years), the water injection wells are easy to communicate with each other prem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B49/00E21B47/00E21B43/30G06F30/20
CPCE21B43/26E21B49/00E21B47/00E21B43/305G06F30/20Y02A10/40
Inventor 李志文张矿生唐梅荣张彦军王文雄吴顺林徐创朝刘顺曹宗熊山树民
Owner PETROCHINA CO LTD
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