CN1869398A - Fracture method for horizontal well - Google Patents
Fracture method for horizontal well Download PDFInfo
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- CN1869398A CN1869398A CN 200510072121 CN200510072121A CN1869398A CN 1869398 A CN1869398 A CN 1869398A CN 200510072121 CN200510072121 CN 200510072121 CN 200510072121 A CN200510072121 A CN 200510072121A CN 1869398 A CN1869398 A CN 1869398A
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Abstract
The invention relates to a level well pressing crack method. The feature is that: under the full well section equal perforation condition, adopting field analysis diagnose and temporary blocking agent technology to realize multi cracks construction. The invention has reasonable design, simple technology, and is easy to operate, and could obviously improve the employing degree of the full well section and well bore perfect degree.
Description
Technical field: the present invention relates to a kind of oil field oil production technology technology, especially for a kind of fracture method for horizontal well of down-hole measure.
Technical background: before the present invention, each oil field is for realizing the construction effect of many man-made fractures in horizontal well long well section fracturing work, what generally adopt is the current limliting fracturing process, promptly in full well section, penetrate out the 3-4 section or the perforated interval of multistage more respectively, and, make fracturing fluid shunt and reach the purpose of many man-made fractures of a pressure break realization by controlling the length and the perforation quantity of each perforated interval; The major defect of this method is essential the use the relatively large equipment in construction, also because each perforated interval is short, perforation quantity is few, degree of perfection is low, has obviously reduced horizontal well capacity performance, influenced the pressing crack construction effect.
Summary of the invention: the objective of the invention is: for horizontal well long well section fracturing work provides a kind of fracture method for horizontal well, be under the prerequisite of the complete even perforation of well section, diagnose by field assay in the fracturing process, and the use by diverting agent and liquid gum plug, simultaneously reasonable matching technique parameter, realize the construction purpose of many man-made fractures, thereby improve well bore degree of perfection and pressing crack construction effect, give full play to the development degree of full well section.
The objective of the invention is to realize by following measure: a kind of fracture method for horizontal well is for the construction down of the even perforating condition of the full well section of horizontal well, comprises it is characterized in that common fracturing technology, field assay diagnosis, diverting agent and liquid gum plug use etc.:
The blank tubing fracturing string of A, employing band casing pressure sensor carries out pressing crack construction;
B, the construction stage of constructing several times carry out, and all fall by bottom hole fracturing pressure (BHFP) after first construction stage and carry out on-the-spot real-time judge man-made fracture open strip number;
C, employing diverting agent carry out shutoff to the crack that has pressed off;
Average fluid efficiency is determined in D, the analysis of employing small scale fracturing test pressure drop parameter;
E, employing liquid gum plug reduce fracturing fluid leak, improve fluid efficiency;
F, along with fracture propagation, divide 3-5 step progressively to improve operational discharge capacity.
The present invention is reasonable in design, technology is simple, be convenient to operation, construction effect is obvious, can be widely used in the long well section pressing crack construction of horizontal well or common oil well; Owing to be under the complete even perforating condition of well section, adopted technology such as field assay diagnosis and diverting agent to finish the construction of many man-made fractures, not only guaranteed the pressing crack construction effect, also obviously improved the development degree of well bore degree of perfection and full well section.
The specific embodiment: followingly just hold up flat 1 well construction reality that fracture method for horizontal well is further specified in conjunction with Jilin Oil Field.
This well is one of the horizontal well of domestic more shallow (400m), fractured well segment length 40m, even perforation be totally 480 holes, because to pressing off parameter predictions such as several seams, operation pressure grade, fluid efficiency in the fracturing process according to insufficient, therefore carried out before pressing beginning formal construction after the pressure break test, concrete grammar is:
1, the down-hole be lowered to band casing pressure sensor earlier the blank tubing fracturing string to the precalculated position, carry out pressing crack construction after connecting ground installation again.
2, in the fracturing process after the construction of finishing the small scale fracturing stage, bottom hole fracturing pressure (BHFP) by falloff curve reflection falls and has carried out on-the-spot real-time judge, analyze from falloff curve and can divide into four closing points, illustrate that heterogeneous reservoir opened at least four man-made fractures.
3, fall discharge capacity by ladder this moment and analyze that to convert out effective feed liquor hole count behind the eyelet frictional resistance be 28.6, and determine that in view of the above dropping into the 10kg diverting agent carries out shutoff to the crack that has pressed off.
4, simultaneously, determine that according to three closing point analyses of small scale fracturing test pressure drop this guanidine glue (0.35%) fluid efficiency is respectively 19%, 40%, 55%, average out to 38% is lower than design fluid efficiency (45%) 7%.
5, adopt high concentration frozen glue (0.5%) liquid gum plug 20m
3As falling filtering agent, improve fluid efficiency.
6, the prepad fluid discharge capacity is 4m3/min, along with fracture propagation, for keep the effective net pressure in down-hole steadily and man-made fracture effectively expand, according to bottom pressure decline situation, divide 3 steps progressively to improve operational discharge capacity.The concrete grammar of each construction stage is: beginning is with 1m3/min discharge capacity pumping high pressure diverting agent; Pressure rises the back with 2.5m
3/ min discharge capacity pumps into high concentration frozen glue; When pressure rises to 13.14MPa with 4m
3/ min discharge capacity pumps into prepad fluid, along with the rising of discharge capacity, new breakdown point occurs, and effectively the feed liquor hole count increases, and begins to add sand behind the bottom-hole treating pressure decline 0.5MPa, and average sand is than 23%, the actual sand 15.6m that adds
3, the highest sand speed that adds reaches 1.5m
3/ min verifies with production after the construction after tested, and man-made fracture bar number and full well section degree of perfection have all reached designing requirement.
Claims (1)
1, a kind of fracture method for horizontal well is for the construction down of the even perforating condition of the full well section of horizontal well, comprises it is characterized in that common fracturing technology, field assay diagnosis, diverting agent and liquid gum plug use etc.:
The blank tubing fracturing string of A, employing band casing pressure sensor carries out pressing crack construction;
B, the construction stage that forms man-made fracture several times of constructing carry out, and all fall by bottom hole fracturing pressure (BHFP) after first construction stage and carry out on-the-spot real-time judge man-made fracture open strip number;
C, employing diverting agent carry out shutoff to the crack that has pressed off;
Average fluid efficiency is determined in D, the analysis of employing small scale fracturing test pressure drop parameter;
E, employing liquid gum plug reduce fracturing fluid leak, improve fluid efficiency;
F, along with fracture propagation, divide 3-5 step progressively to improve operational discharge capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510072121 CN1869398A (en) | 2005-05-25 | 2005-05-25 | Fracture method for horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510072121 CN1869398A (en) | 2005-05-25 | 2005-05-25 | Fracture method for horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1869398A true CN1869398A (en) | 2006-11-29 |
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ID=37443160
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|---|---|---|---|
| CN 200510072121 Pending CN1869398A (en) | 2005-05-25 | 2005-05-25 | Fracture method for horizontal well |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775023A (en) * | 2013-01-30 | 2014-05-07 | 中国石油天然气股份有限公司 | Method for pressing low-pressure oil and gas well |
| CN106437662A (en) * | 2016-10-26 | 2017-02-22 | 东方宝麟科技发展(北京)有限公司 | Hybrid temporary plugging volume fracturing method suitable for deep shale gas horizontal well |
| CN106894802A (en) * | 2015-12-18 | 2017-06-27 | 中国石油化工股份有限公司 | A kind of small scale fracturing test method for being suitable for shale gas well |
| CN106948800A (en) * | 2017-02-10 | 2017-07-14 | 西南石油大学 | A kind of staged fracturing of horizontal well construction diagnostic method of working condition |
| CN107605451A (en) * | 2017-09-15 | 2018-01-19 | 中国地质大学（武汉） | A kind of ladder discharge capacity fracturing pump injecting method based on combined perforation |
| CN109236259A (en) * | 2018-10-31 | 2019-01-18 | 西安科技大学 | A kind of contradictory fracturing process of adjustment water injection well plane water drive |
| CN109763804A (en) * | 2018-12-28 | 2019-05-17 | 北京大学 | A kind of horizontal well in segments temporarily blocks up fracturing process |
| CN109826607A (en) * | 2019-04-02 | 2019-05-31 | 青岛大地新能源科技研发有限公司 | A kind of novel temporary stall is to fracturing process |
| CN111236914A (en) * | 2020-01-19 | 2020-06-05 | 中国石油大学(北京) | Horizontal well multi-fracture fracturing method |
-
2005
- 2005-05-25 CN CN 200510072121 patent/CN1869398A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775023B (en) * | 2013-01-30 | 2016-05-11 | 中国石油天然气股份有限公司 | A kind of low pressure oil gas well kill-job practice |
| CN103775023A (en) * | 2013-01-30 | 2014-05-07 | 中国石油天然气股份有限公司 | Method for pressing low-pressure oil and gas well |
| CN106894802A (en) * | 2015-12-18 | 2017-06-27 | 中国石油化工股份有限公司 | A kind of small scale fracturing test method for being suitable for shale gas well |
| CN106894802B (en) * | 2015-12-18 | 2020-05-15 | 中国石油化工股份有限公司 | Small-sized fracturing testing method suitable for shale gas well |
| CN106437662B (en) * | 2016-10-26 | 2019-03-29 | 东方宝麟科技发展(北京)有限公司 | Volume fracturing method is temporarily blocked up in a kind of mixing suitable for deep layer shale gas horizontal well |
| CN106437662A (en) * | 2016-10-26 | 2017-02-22 | 东方宝麟科技发展(北京)有限公司 | Hybrid temporary plugging volume fracturing method suitable for deep shale gas horizontal well |
| CN106948800A (en) * | 2017-02-10 | 2017-07-14 | 西南石油大学 | A kind of staged fracturing of horizontal well construction diagnostic method of working condition |
| CN107605451B (en) * | 2017-09-15 | 2018-06-22 | 中国地质大学（武汉） | A kind of ladder discharge capacity fracturing pump injecting method based on combined perforation |
| CN107605451A (en) * | 2017-09-15 | 2018-01-19 | 中国地质大学（武汉） | A kind of ladder discharge capacity fracturing pump injecting method based on combined perforation |
| CN109236259A (en) * | 2018-10-31 | 2019-01-18 | 西安科技大学 | A kind of contradictory fracturing process of adjustment water injection well plane water drive |
| CN109763804A (en) * | 2018-12-28 | 2019-05-17 | 北京大学 | A kind of horizontal well in segments temporarily blocks up fracturing process |
| CN109826607A (en) * | 2019-04-02 | 2019-05-31 | 青岛大地新能源科技研发有限公司 | A kind of novel temporary stall is to fracturing process |
| CN111236914A (en) * | 2020-01-19 | 2020-06-05 | 中国石油大学(北京) | Horizontal well multi-fracture fracturing method |
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