CN101948681A - Drilling circulating fluid conversion preflush and preparation method thereof - Google Patents
Drilling circulating fluid conversion preflush and preparation method thereof Download PDFInfo
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- CN101948681A CN101948681A CN2010102968146A CN201010296814A CN101948681A CN 101948681 A CN101948681 A CN 101948681A CN 2010102968146 A CN2010102968146 A CN 2010102968146A CN 201010296814 A CN201010296814 A CN 201010296814A CN 101948681 A CN101948681 A CN 101948681A
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Abstract
The invention discloses drilling circulating fluid conversion preflush and a preparation method thereof. The drilling circulating fluid conversion preflush consists of an organic ester, a plasticizer, oil, an emulsifier and a plugging agent, wherein the organic ester is phthalate esters or polyol benzoates; the plasticizer is one of polyethylene or vinyl chloride resin; the oil is mineral oil or vegetable oil; the emulsifier is one or more of OP-10, OP-30, tween-80, SP-80, oleic acid, P-30 and P-20; and the plugging agent is one of asphalt or modified asphalt products. The drilling circulating fluid conversion preflush has the advantages of: nontoxic or harmless production process, wider appropriate temperature range (-30 to 200 DEG C) than the appropriate temperature range (-5 to 160 DEG C) of conventional oil-in-water circulating fluid conversion preflush, stable product performance, good effect on keeping borehole wall stability, and capacity of shortening over 2/3 of complex processing time after conversing a drilling circulating fluid, improves drilling prescription, and saves drilling cost.
Description
Technical field
The present invention relates to spearhead that oil and gas well drilling uses and preparation method thereof technical field, is a kind of drilling well circulating fluid conversion spearhead and preparation method thereof.
Background technology
Gas drilling mainly is with gas base flow body and the gaseous type fluid a kind of special drilling mode as circulatory mediator.Because in the gas drilling process, tend to because unpredictable geology is former thereby all multifactor of gas drilling occur being unfavorable for, and reason such as engineering requirement can not continue usefulness gas base flow body and carries out drilling well, need be converted to conventional drilling, gas base flow body (scrubbed gas) is converted to gaseous type fluid or water yl drilling fluids such as inflation, foam by gas drilling, or directly be converted to all kinds of water-based drilling liquid system by the gaseous type fluid, to adapt to the engine request that gas drilling transfers the conventional drilling mode to.But because the conversion of drilling mode, fluid type, it is almost inevitable down hole problem, particularly leakage phenomena usually to occur.
Creep in back or the gas drilling process at gas, in order to carry out some special construction operations, go into water-base drilling fluid before often all needing and carry out kill-job, to finish corresponding construction operation or to continue to creep into.In the gas drilling conversion water-based fluid process, the pit shaft internal pressure changes, and water enters the stratum and makes rock generation physics and chemical transformation.Practical situation according to the past gas drilling, finish at gas drilling, preceding go into drilling fluid after, complexcase have appearred in the well greater than 80%, its core and the most basic problem are exactly the wellbore stability problem, comprise gently then blocked portion, reaming, heavy then cause sidetracking because of being difficult to behind the bit freezing handle, had a strong impact on the performance of gas drilling advantage.
Generally take three kinds of technologies to carry out the circulating fluid conversion process at present both at home and abroad: (1) uses the wettability reversal spearhead, and the water-wetted surface of rock is transformed into oil-wetted surface, slows down filtrate and invades the stratum.Be used performance fine drilling fluid and reasonable construction scheme again, can guarantee that follow-up construction carries out smoothly; (2) nonresistant strata that has bored being implemented shutoff reinforces; (3) select barrier film drill in fluid or film forming shutoff protection hydrocarbon zone drilling liquid technology for use.
Summary of the invention
The invention provides a kind of drilling well circulating fluid conversion spearhead and preparation method thereof, overcome the problem that above-mentioned prior art exists, its production process is nontoxic, the optimal temperature scope is wide, product performance stable, the maintenance wellbore stability is effective, improved the drilling well timeliness, saved drilling cost.
One of technical scheme of the present invention realizes by following measure: a kind of drilling well circulating fluid conversion spearhead, and it consists of by mass parts: 50 parts to 100 parts organic ester, 5 parts to 20 parts softening agent, 50 parts to 140 parts oil, 0.1 part to 1 part emulsifying agent, 2 parts to 10 parts plugging agent; Wherein, organic ester is phthalate or DEDB class, softening agent is a kind of in polyethylene or the polyvinyl chloride (PVC) RESINS, and oil is mineral oil or vegetables oil, and emulsifying agent is one or more among OP-10, OP-30, tween-80, SP-80, oleic acid, P-30, the P-20; Plugging agent is a kind of in pitch or the modifying asphalt series products.
Can further carry out following selection or/and optimize to one of technical scheme of the invention described above:
Above-mentioned mineral oil is a kind of in white oil, diesel oil, the aviation kerosene.
Above-mentioned vegetables oil is a kind of in the modified vegetable oil series products of Oleum Gossypii semen and other vegetables oil.
Two of technical scheme of the present invention realizes by following measure: a kind of preparation method of above-mentioned drilling well circulating fluid conversion spearhead, it is undertaken by following step: under 80 ℃ to 150 ℃ with the softening agent uniform dissolution of requirement in the organic ester of requirement, fully stirred 3 hours to 10 hours, the oil, emulsifying agent and the plugging agent that add requirement again stirred 2 hours to 5 hours, form stable fluid, promptly make circulating fluid conversion spearhead.
The invention has the beneficial effects as follows: production process is nontoxic, optimal temperature scope (30 ℃ to 200 ℃) is wider than existing oil-in-water circulating fluid conversion spearhead (5 ℃ to 160 ℃), product performance are stable, the effective advantage of maintenance wellbore stability, the complex process time after the drilling well circulating fluid conversion of can shortening is more than 2/3, improve the drilling well timeliness, saved drilling cost.
Embodiment
The present invention is not subjected to the restriction of following embodiment, can determine concrete embodiment according to technical scheme of the present invention and practical situation.
Below in conjunction with embodiment the present invention is further described.
Embodiment 1, this drilling well circulating fluid conversion spearhead consists of by mass parts: consist of by mass parts: 50 parts to 100 parts organic ester A, 5 parts to 20 parts softening agent B, 50 parts to 140 parts oily C, 0.1 part to 1 part emulsifying agent D, 2 parts to 10 parts plugging agent E; Wherein, organic ester A is phthalate or DEDB class, softening agent B is a kind of in polyethylene or the polyvinyl chloride (PVC) RESINS, oil C is mineral oil or vegetables oil, and emulsifying agent D is one or more among OP-10, OP-30, tween-80, SP-80, oleic acid, P-30, the P-20; Plugging agent E is a kind of in pitch or the modifying asphalt series products.
Embodiment 2, are with the difference of embodiment 1: the mineral oil of embodiment 2 is a kind of in white oil, diesel oil, the aviation kerosene.
Embodiment 3, are with the difference of embodiment 1: the vegetables oil of embodiment 3 is a kind of in the modified vegetable oil series products of Oleum Gossypii semen and other vegetables oil.
Embodiment 4, the drilling well circulating fluid of the foregoing description conversion spearhead obtains by following steps: under 80 ℃ to 150 ℃ with the softening agent B uniform dissolution of requirement in the organic ester A of requirement, fully stirred 3 hours to 10 hours, oily C, the emulsifying agent D and the plugging agent E that add requirement again stirred 2 hours to 5 hours, form stable fluid, promptly make circulating fluid conversion spearhead.
The difference of following embodiment and the foregoing description 1 to 4 is: the starting material machine ester A that selects for use in following examples is a Bisphthalate, and softening agent B is a polyvinyl chloride (PVC) RESINS, and oily C is a white oil, and emulsifying agent D is SP-80, and plugging agent E is a sulfonated gilsonite.
Embodiment 5
A:B:C:D:E=80:5:50:0.1:2 takes by weighing each starting material by the quality proportioning, under 80 ℃ to 150 ℃ with softening agent B uniform dissolution in organic ester A, fully stirred 3 hours to 10 hours, adding oils C, emulsifying agent D and plugging agent E again stirred 2 hours to 5 hours, form stable fluid, promptly make gas drilling circulating fluid conversion spearhead.
Embodiment 6
A:B:C:D:E=100:10:120:0.8:10 takes by weighing each starting material by the quality proportioning, under 80 ℃ to 150 ℃ with softening agent B uniform dissolution in organic ester A, fully stirred 3 hours to 10 hours, adding oils C, emulsifying agent D and plugging agent E again stirred 2 hours to 5 hours, form stable fluid, promptly make gas drilling circulating fluid conversion spearhead.
Embodiment 7
A:B:C:D:E=80:15:120:0.6:4 takes by weighing each starting material by the quality proportioning, under 80 ℃ to 150 ℃ with softening agent B uniform dissolution in organic ester A, fully stirred 3 hours to 10 hours, adding oils C, emulsifying agent D and plugging agent E again stirred 2 hours to 5 hours, form stable fluid, promptly make gas drilling circulating fluid conversion spearhead.
Each embodiment performance comparison is estimated:
| Prescription | 150 ℃, heat is rolled the 16h rate of recovery (%) | 150 ℃, heat is rolled the 16h rate of recovery (%) |
| ? | Primary recovery (%) | Secondary recovery rate (%) |
| Embodiment 5 | 89.70 | 92.65 |
| Embodiment 6 | 90.85 | 92.20 |
| Embodiment 7 | 92.92 | 96.99 |
As can be seen from the above table, embodiment 5 to 7 products all have very strong inhibition, and wherein embodiment 7 effects are best.
Claims (5)
1.
A kind of drilling well circulating fluid conversion spearhead is characterized in that consisting of by mass parts: 50 parts to 100 parts organic ester, 5 parts to 20 parts softening agent, 50 parts to 140 parts oil, 0.1 part to 1 part emulsifying agent, 2 parts to 10 parts plugging agent; Wherein, organic ester is phthalate or DEDB class, softening agent is a kind of in polyethylene or the polyvinyl chloride (PVC) RESINS, and oil is mineral oil or vegetables oil, and emulsifying agent is one or more among OP-10, OP-30, tween-80, SP-80, oleic acid, P-30, the P-20; Plugging agent is a kind of in pitch or the modifying asphalt series products.
2.
Drilling well circulating fluid according to claim 1 conversion spearhead is characterized in that mineral oil is a kind of in white oil, diesel oil, the aviation kerosene.
3.
Drilling well circulating fluid according to claim 1 conversion spearhead is characterized in that vegetables oil is a kind of in the modified vegetable oil series products of Oleum Gossypii semen and other vegetables oil.
4.
According to claim 1 or 2 or 3 described drilling well circulating fluid conversion spearheads, it is characterized in that obtaining by following step: under 80 ℃ to 150 ℃ with the softening agent uniform dissolution of requirement in the organic ester of requirement, fully stirred 3 hours to 10 hours, the oil, emulsifying agent and the plugging agent that add requirement again stirred 2 hours to 5 hours, form stable fluid, promptly make circulating fluid conversion spearhead.
5.
A kind of preparation method according to claim 1 or 2 or 3 described drilling well circulating fluid conversion spearheads, it is characterized in that being undertaken by following step: under 80 ℃ to 150 ℃ with the softening agent uniform dissolution of requirement in the organic ester of requirement, fully stirred 3 hours to 10 hours, the oil, emulsifying agent and the plugging agent that add requirement again stirred 2 hours to 5 hours, form stable fluid, promptly make circulating fluid conversion spearhead.
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| CN 201010296814 CN101948681B (en) | 2010-09-29 | 2010-09-29 | Drilling circulating fluid conversion preflush and preparation method thereof |
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| CN 201010296814 CN101948681B (en) | 2010-09-29 | 2010-09-29 | Drilling circulating fluid conversion preflush and preparation method thereof |
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| CN101948681A true CN101948681A (en) | 2011-01-19 |
| CN101948681B CN101948681B (en) | 2013-04-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103113871A (en) * | 2013-01-15 | 2013-05-22 | 中国石油天然气股份有限公司 | Selecting and blocking ball for performing profile control of water injection well in medium-high temperature oilfield and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1445329A (en) * | 2002-03-14 | 2003-10-01 | 胜利石油管理局钻井工艺研究院 | Synthesized base sealing fluid and its production technique |
| CN101319136A (en) * | 2007-06-07 | 2008-12-10 | 中国石油化工股份有限公司 | Ahead fluid for gas-liquid conversion artesian well and its use method |
| CN101747872A (en) * | 2008-12-12 | 2010-06-23 | 西部钻探克拉玛依钻井工艺研究院 | Water-in-oil sealing fluid and preparation method thereof |
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2010
- 2010-09-29 CN CN 201010296814 patent/CN101948681B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1445329A (en) * | 2002-03-14 | 2003-10-01 | 胜利石油管理局钻井工艺研究院 | Synthesized base sealing fluid and its production technique |
| CN101319136A (en) * | 2007-06-07 | 2008-12-10 | 中国石油化工股份有限公司 | Ahead fluid for gas-liquid conversion artesian well and its use method |
| CN101747872A (en) * | 2008-12-12 | 2010-06-23 | 西部钻探克拉玛依钻井工艺研究院 | Water-in-oil sealing fluid and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103113871A (en) * | 2013-01-15 | 2013-05-22 | 中国石油天然气股份有限公司 | Selecting and blocking ball for performing profile control of water injection well in medium-high temperature oilfield and preparation method and application thereof |
| CN103113871B (en) * | 2013-01-15 | 2016-12-28 | 中国石油天然气股份有限公司 | Middle high temperature oil field Profile Control in Injection Well selective plugging ball and preparation method and application |
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| CN101948681B (en) | 2013-04-03 |
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Effective date of registration: 20201104 Address after: 100120 Beijing Xicheng District six laying Kang Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Xibu Drilling Engineering Co.,Ltd. Address before: 834000 the Xinjiang Uygur Autonomous Region Karamay Hongyan Road No. 80 West Karamay Drilling Drilling Technology Research Institute Patentee before: CNPC Xibu Drilling Engineering Co.,Ltd. |
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