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Organic salt weighting agent

An organic salt and weighting agent technology, applied in the field of drilling, can solve the problems of performance defects limiting the scope of application, etc., and achieve the effects of suppressing borehole wall cracks, protecting oil and gas layers, and improving temperature resistance

Pending Publication Date: 2021-05-07
KARAMAY CITY YIEN TECHN SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] After 30 years of development and improvement, although the application of halogen compound salts in drilling fluids and completion fluids has matured, the performance defects of this type of inorganic salts also limit their application range

Method used

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Embodiment 1

[0021] Embodiment 1: a kind of organic salt weighting agent, it comprises organic salt, and the molecular formula of described organic salt is: AR (COO) n m n , wherein A is a heteroatom or a group with a heteroatom, R is an organic carbon chain with 1 to 6 carbons, COO— is an organic carboxylate, and M is a metal cation or ammonium ion.

[0022] The organic salt weighting agent prepared by the invention is a white powder, tasteless, odorless, non-volatile, very stable at normal temperature, and its properties can be kept unchanged for several years. The substance is easy to absorb moisture, soluble in water, neutral or slightly alkaline in aqueous solution, slightly soluble in organic solvents such as acetone and ethanol.

[0023] The R of organic salt of the present invention is the organic carbon chain of carbon number 1~6, according to the C—C bond energy (347kJ / mol), C=C bond energy (611kJ / mol) of organic compound, C≡C bond energy ( 837kJ / mol), C—O bond energy (360kJ / mo...

Embodiment 2

[0054] Embodiment 2: organic salt of the present invention has carried out extensive application test in Karamay Oilfield, and it is in Karamay Oilfield Dongwan 1 well, Huo 002, 003 well, Gaoquan 1 well, Jiuyun 1 well, An 5 well, An Well 001, Well Tai 59, Well Tai 60, Mana 1, Well Mana 001, 002, 003, Well Tai 62, and Well 63 are fully used in drilling and oil testing completion fluids, and as completion fluids in the Tarim Oilfield 1. Yeyun 2 and other wells are used in more than 10 wells. It is also used in the drilling of high-density complex wells in the piedmont of the southern edge of Xinjiang Oilfield and the piedmont of Zhundong Oilfield, as well as oil testing operations of high-temperature and high-pressure wells, and drilling wells with a depth of more than 7000m in Tarim Oilfield Drilling operations and high-temperature and high-pressure well testing operations have been verified by production and are very suitable for complex well drilling operations in the Turpan-H...

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Abstract

The invention discloses an organic salt weighting agent which comprises an organic salt, the molecular formula of the organic salt is AR(COO)nMn, wherein A is a heteroatom or a group with a heteroatom, R is an organic carbon chain with a carbon number of 1-6, COO<-> is an organic carboxylate radical, and M is a metal cation or an ammonium ion. The organic salt weighting agent disclosed by the invention has the chemical molecular structure characteristics of formate, namely contains organic acid radicals such as COO <-> and cations such as low-valence alkali metal ions, shows relatively high density and relatively good temperature-resistant stability and inhibitive ability, can resist various types of pollution, and is beneficial to protecting an oil and gas reservoir. The drilling speed can be increased by using the drilling fluid, and production verifies that the drilling fluid is very suitable for drilling operation of complex wells in the Duha oil field.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to an organic salt weighting agent. Background technique [0002] After 30 years of development and improvement, although the application of halogen compound salts in drilling fluids and completion fluids has matured, the performance defects of this type of inorganic salts also limit their application range. In recent years, experimental studies and field tests have shown that organic salts represented by formic acid and alkali metals surpass inorganic halogen salts in almost all performance aspects. For example, organic salts can be formulated to produce harmless, high Density salt solution, organic compounds are environmentally degradable substances, the anti-oxidation properties of organic salts improve the resistance to high temperature degradation of viscosifiers and fluid loss control agents, organic salts also have good resistance to salt (sulfate and carbonate ) invasion a...

Claims

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Application Information

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IPC IPC(8): C09K8/035
CPCC09K8/035C09K2208/12
Inventor 逄凯迪火昌盛王勇刘艳萍
Owner KARAMAY CITY YIEN TECHN SERVICES
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