Horizontal well film-coated proppant staged fracturing yield testing method

A technology of staged fracturing and testing methods, which is applied in the directions of measurement, earthwork drilling and production, wellbore/well components, etc. It can solve the problems of difficult identification technology, small difference in tracer concentration, short validity period of post-fracture test sampling analysis, etc. question

Inactive Publication Date: 2020-07-31
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, the current existing test methods have the following problems: the tracer has a small concentration difference, and the identifica

Method used

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  • Horizontal well film-coated proppant staged fracturing yield testing method

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Embodiment 1

[0040] This embodiment provides a method for testing the yield of horizontal well film-coated proppant staged fracturing, including the following steps:

[0041] Step 1) Select different types of tracers for different fracturing stages according to the number of fracturing stages in the horizontal well;

[0042] Step 2) Mark different types of tracers in the polymer to obtain different types of quantum dot polymers, and then form different types of quantum dot polymer coating proppants with different types of quantum dot polymers and proppants;

[0043] Step 3) During the fracturing construction of each fracturing stage, part of the proppant is first added along with the fracturing fluid, then a quantum dot polymer coating proppant is added, and the rest of the proppant is added at last. The amount added to each fracturing stage Quantum dot polymer coating proppant concentration is the same;

[0044] Step 4) During the production of the lower pump layer, measure the liquid ou...

Embodiment 2

[0052] This embodiment provides a method for testing the yield of horizontal well film-coated proppant staged fracturing, including the following steps:

[0053] Step 1) Select the same amount and type of tracer according to the number of staged fracturing stages of the horizontal well;

[0054] Step 2) Mark different types of tracers in the polymer to obtain different types of quantum dot polymers, and then coat different types of quantum dot polymers on the surface of the proppant to form different types of quantum dot polymer coating supports agent;

[0055] Step 3) During the fracturing construction, use the sand tank truck to load the quantum dot polymer coating proppant, add the sand bucket of the sand mixer truck, add a quantum dot polymer coating proppant with the fracturing fluid for each fracturing section, and add a quantum dot polymer coating proppant with the fracturing fluid. The concentration of quantum dot polymer coating proppant added to each fracturing stag...

Embodiment 3

[0063] On the basis of Example 1, this example provides a test method for staged fracturing production of horizontal well film-coated proppants, the polymers include oil-soluble polymers and water-soluble polymers, and the tracers are respectively marked The oil-soluble polymer and the water-soluble polymer are post-mixed and evenly coated on the surface of the proppant, wherein the molar ratio of the oil-soluble polymer and the water-soluble polymer is 1:1.

[0064] Because polymers include both water-soluble polymers and oil-soluble polymers, they will not dissolve during the injection of fracturing fluid. Only after being added to the formation, as the oil well is produced, it will slowly dissolve when it encounters crude oil and formation water. The coating agent on the surface of the agent is oil-soluble and water-soluble at the same time, the quantum dot tracer marker 2 marked on the oil-soluble polymer exists in the oil phase, and the quantum dot tracer marker 2 marked o...

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Abstract

The invention provides a horizontal well film-coated proppant staged fracturing yield testing method. The method comprises the steps that a tracer is synthesized into nanocrystals through colloid by adopting a quantum dot technology, then the nanocrystals are marked in a polymer, the polymer is adsorbed on the surface of a proppant to form a polymer coating, a fracturing fluid is utilized to carrya quantum dot polymer coating proppant to be added into a stratum during horizontal well staged fracturing, a combination of quantum dot tracer markers is judged by using laser to irradiate particlesin a liquid flow through stratum fluid sampling after production, and the oil production and water production contributions of all layer sections are accurately calculated. The service validity period of the quantum dot tracer markers is as long as 2 years. The polymer comprises a water-soluble polymer and an oil-soluble polymer at the same time, when the polymer encounters a stratum fluid, the quantum dot tracer markers marked on the oil-soluble polymer exist in an oil phase, the quantum dot tracer markers marked on the water-soluble polymer exist in a water phase, and the oil-water phase distribution coefficient is stable.

Description

technical field [0001] The invention belongs to the technical field of oil production engineering, and in particular relates to a method for testing the yield of horizontal well membrane-covered proppant staged fracturing. Background technique [0002] In order to obtain higher productivity in oilfield development, oil well fracturing technology has been continuously developed. In recent years, the staged fracturing technology of horizontal wells has become the main means to effectively develop tight oil, but after fracturing, it is multi-stage commingled production. Therefore, how to evaluate and analyze the fracturing effect and productivity of each stage is very important, which is very important for fracturing. The design and development adjustment in the later stage of fracturing have important guiding significance. [0003] The patent title is "A Method for Monitoring the Staged Fracturing Effect of an Oil Well", and the patent application publication number is CN1040...

Claims

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Application Information

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IPC IPC(8): E21B43/267E21B47/00E21B49/00G01N21/63
CPCE21B43/267E21B47/00E21B49/00G01N21/63
Inventor 吴顺林赵振峰张矿生唐梅荣李楷山树民黄蓬刚陈强李志文
Owner PETROCHINA CO LTD
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