High-temperature ebonite foam for unbalanced drilling and preparation method thereof
An underbalanced drilling and high-temperature technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of difficult drilling construction, foam performance attenuation, weak resistance to temperature and oil, etc., to achieve enhanced sand-carrying ability, The effect of stable foam performance and strong oil resistance
Active Publication Date: 2013-04-03
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0004] The invention provides a kind of high-temperature hard rubber foam for underbalanced drilling and its preparation method, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of common The foam system is weak in temperature resistance, salt resistance and oil resistance, and the foam performance attenuates seriously, which leads to the difficulty of drilling construction
Method used
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Embodiment 1
[0015] Example 1, the high-temperature hard rubber foam for underbalanced drilling contains 1% to 3% of banclay, 3% to 6% of composite foaming agent, 0.3% to 0.6% of foam stabilizer, and the balance is water.
Embodiment 2
[0016] Example 2, the high-temperature hard rubber foam for underbalanced drilling contains 1% of banclay, 3% of composite foaming agent, 0.3% of foam stabilizer, and the balance is water.
Embodiment 3
[0017] Example 3, the high-temperature hard rubber foam for underbalanced drilling contains 3% of banclay, 6% of composite foaming agent, 0.6% of foam stabilizer, and the balance is water.
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The invention relates to the technical field of unbalanced drilling, and particularly relates to high-temperature ebonite foam for unbalanced drilling and a preparation method thereof. The high-temperature ebonite foam for unbalanced drilling comprises the following components in percentage by weight: 1-3% of bentonite, 3-6% of composite foaming agent, 0.3-0.6% of foam stabilizer and the balance of water. Through the synergistic effect of the composite foaming agent and the foam stabilizer, the high-temperature ebonite foam provided by the invention has the characteristics of dense foam, temperature resistance, salt resistance, strong oil resistance and stable foam performance; and the sand carrying ability is enhanced, and the requirements for drilling construction are met better.
Description
technical field [0001] The invention relates to the technical field of underbalanced drilling, and relates to a high-temperature hard rubber foam for underbalanced drilling and a preparation method thereof. Background technique [0002] With the exploration and development of oil and gas fields, conventional oil and gas resources are gradually exhausted, and many proven undeveloped reserves are basically low-pressure and low-permeability oil fields. Underbalanced drilling has the advantages of reducing formation damage, increasing ROP, reducing circulation pressure loss, avoiding lost circulation and reducing differential pressure sticking, etc. It has been greatly developed in the past 10 years. Foam drilling is a special form of underbalanced drilling technology. The main fluid is foam, which has low density, strong ability to suspend and carry cuttings, low hydrostatic column pressure, small filtration loss, small friction loss, and drainage ability. It is widely used in...
Claims
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IPC IPC(8): C09K8/38
Inventor 黄文红王磊王秀霞张德莲刘晓兰李良兵古扎丽张菀乔顾若馨
Owner BC P INC CHINA NAT PETROLEUM CORP