CN103184868A - Method for identifying distribution of interlayers, sandwich layers and residual oil in sandstone reservoir - Google Patents
Method for identifying distribution of interlayers, sandwich layers and residual oil in sandstone reservoir Download PDFInfo
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- CN103184868A CN103184868A CN 201110452849 CN201110452849A CN103184868A CN 103184868 A CN103184868 A CN 103184868A CN 201110452849 CN201110452849 CN 201110452849 CN 201110452849 A CN201110452849 A CN 201110452849A CN 103184868 A CN103184868 A CN 103184868A
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Abstract
The invention relates to a method for identifying the distribution of interlayers, sandwich layers and residual oil in a sandstone reservoir, which mainly aims at the current development situations that after the Zhoucheng oil field is subjected to 14a high-efficient development and enters an extra-high water cut development period, production decline is accelerated, so intra-layer water flooding of a thick oil layer is not uniform and underground oil and water distribution is complex; the information of an oil reservoir close well spacing and abundant dynamic monitoring information are utilized fully for performing step-by-step subdivision and comparative research on the reservoir and establishing the identification standard of interlayers and sandwich layers of Es1; and by comparing fine planar and longitudinal rock points of sand bodies of small layers and flow units, two stable intercalation layers are found out, the sandstone of an Es1 bottom block is subdivided into three sub sections, and No. 1 to No. 6 small layers are subdivided into eleven flow units.
Description
Affiliated technical field:
The present invention relates to a kind of sandstone oil reservoir every, interlayer and remaining oil distribution recognition methods, belong to oil recovery field, oil field.
Background technology:
The oil field is efficiently developed through 14a, enters ultra-high water-containing production decline quickening after development period, and heat-bodied oil is interior water logging inequality and subterranean oil water distribution complexity layer by layer.
Summary of the invention:
(1) utilizes core analysis to combine with well-log information, set up continent IV fault block every the interlayer standard.
(2) carry out the meticulous contrast of substratum and Research on partition, finished 40 mouthfuls of well detail correlation of reservoir beds and division work, worked out 40 mouthfuls of well layer data outcome tables.
(3) research is thought, one section sole piece sandstone oil reservoir inside of IV fault block buttress, continent, Zhou Cheng oil field has 17 from top to bottom every interlayer, stable in one section block thick oil pay of its Parma have 2 every interlayer, be that 5-6 number and 2-3 number are every interlayer, more stable has 4 every interlayer, be 1-2 number, 3-4 number, 4-5 number and 6-7 number, all the other are unsettled every interlayer.2 1. in substratum, the interlayer that distribution area accounts in the oil area 30%-60% scope has 5, is respectively, 3 1., 5 1., 6 1., 6 2..5-6 number and 2-3 number will pile up neatlys one section sole piece sandstone oil every interlayer and be subtracted and roughly can be divided into three inferior section.
(4) research is thought: remaining oil mainly is enriched in main force's facies tract channel bar microfacies on the IV fault block channel sand thick oil pay plane, continent, Zhou Cheng oil field, the remaining oil that has the multistage enrichment in oil reservoir inside, although its water flooding degree is higher, but because core intersection is big, good and the inner interlayer growth of reservoir of oozing property of hole is still the main REGION OF WATER INJECTION OILFIELD that can adopt remaining oil.
(5) formation of continent IV fault block plane remaining oil obviously is subjected to the master control faults control with distribution.At present remaining oil mainly is enriched in: 1. block-fault f21 is divided in north and south the high-order bit of upthrow, i.e. southern piece high-order bit.2. northern piece remaining oil mainly concentrates on continent 6 fritters of f21 tomography and northern border fault block fl clamping and the 17B wellblock, continent of f21 tomography and the clamping of F1 tomography; 3. northern piece plane remaining oil mainly concentrates on channel bar microfacies centre side QK-14 to QK-20 well one line, is high flooded area in its both sides, and the remaining oil distribution in this district has tangible branch band, with southern piece evident difference is arranged.
(6) 1-2 sand group can be divided into 1 and 21,22 4 flow unit (single sand body), and No. 1 the substratum reservoir properties is poor, a little less than the non-homogeneity; No. 2 substratums are the positive rhythm oil reservoir, and oozing property of overall reservoir hole is good, and best with the bottom reservoir properties especially, water flooding degree height, remaining oil mainly concentrate on 22 sand bodies.
(7) 3,4,5 sand groups can be divided into 31,32,41,42 and 51,52 6 flow units (single sand body), totally see, No. 3 substratums are based on anti-rhythm oil reservoir, and the top water flooding degree is higher, and whole remaining oil potentiality mainly are distributed in 32 sand bodies.Intraformational bed sporadicly distributes on No. 4 substratum planes, mainly the distribute position of the relative poor properties in wash surface top of remaining oil; Inner interlayer distributes more stablely on No. 5 little layer planes, can be subdivided into two flow units up and down, and overall top remaining oil is more, and No. 2 floor bottoms, substratum bottom water flooding degree is higher.
(8) No. 6 substratum is one section largest major oil reservoir of sole piece sandstone thick oil pay individual layer reserves of Zhou Cheng oil field buttress, grow in the layer and have more stable 2, be respectively 6 1. with 6 2. number, No. 6 substratums are subdivided into 61,62,63 3 flow units, totally see, 6 substratums are the inhomogeneous water logging of multistage, and remaining oil mainly is distributed in the hypotonic interval of interlayer control.No. 7 substratums are single sand body, and reservoir is for containing the gravel packsand, and water flooding degree height, remaining oil only limit to and be distributed in northern piece and annotate and adopt the imperfection wellblock.
(9) by this subject study, think under the Zhou Cheng oil field that the step direction of taping the latent power is: 1. further segment straticulate exploration, performance difference oil reservoir productive potentialities, carry out interlayer output and take over job.2. the remaining oil enrichment district of growing for development block internal upper part interlayer adopts horizontal well to tap the latent power.3. further improve flooding pattern, mend in scarce water filling wellblock and bore completely penetrating well; Dispensing will be implemented in the water filling well point that can segment as far as possible.
Beneficial effect:
Leak the extract productions by sidetracking adjustment and continent 6 cards, oil reservoir day oil production level bring up to present 40t by 28-30t, comprehensive water cut drops to 87% by 90%, it is obvious to increase oil control water effect.
The specific embodiment:
(1) present 2 substratums of continent 15 wells and 5 little laminated adopting, the high water logging of 2 substratums, 5 substratums are singly adopted in suggestion.Side continent 9 well dead chicks, 5 substratums (Es1-8) top potentiality layer is thrown and is adopted, and side continent 8 wells are to 7 substratum water blockoffs, on return to No. 1 oil sand body production in 5 substratum tops; Corresponding QK-23 well dispensing is strengthened 5 substratum water fillings, forms 5 substratums, 1 notes 3 and adopts segmentation Mining Test well group, singly adopts the 51 oil sand body remaining oil potentiality of taping the latent power by single the notes.
(2) side QK-8 well water detection water blockoff is taped the latent power in order to the potentiality layer from bottom to top and is employed.
(3) suggestion QK-25 well carries out water blockoff to No. 2 substratums, heavily penetrates No. 21 floor production in top.
Claims (1)
1. a sandstone oil reservoir is characterized in that realizing by following step every, interlayer and remaining oil distribution recognition methods: substratum is meticulous to be divided inferior section when; Set up and research every, interlayer criterion of identification; Every, interlayer plane, vertical distribution characteristics; Interlayer and remaining oil distribution relation.
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| CN 201110452849 CN103184868A (en) | 2011-12-28 | 2011-12-28 | Method for identifying distribution of interlayers, sandwich layers and residual oil in sandstone reservoir |
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| CN 201110452849 CN103184868A (en) | 2011-12-28 | 2011-12-28 | Method for identifying distribution of interlayers, sandwich layers and residual oil in sandstone reservoir |
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Cited By (7)
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| CN104110242A (en) * | 2013-08-30 | 2014-10-22 | 中国石油化工股份有限公司 | Method for increasing extraction rate of later exploitation stage of heterogeneous reservoir |
| CN104809283A (en) * | 2015-04-22 | 2015-07-29 | 中国石油天然气股份有限公司 | Interlayer identification method for heavy oil reservoir |
| CN104850732A (en) * | 2014-07-11 | 2015-08-19 | 山东科技大学 | Oil reservoir small layer partitioning method and device based on sand body statistics |
| CN105275457A (en) * | 2014-06-26 | 2016-01-27 | 中国石油化工股份有限公司 | Deployment optimal mode research method for uncompartmentalized oilfield fluvial facies reservoir horizontal well |
| CN105717541A (en) * | 2016-03-17 | 2016-06-29 | 成都创源油气技术开发有限公司 | Reservoir flow unit dividing method |
| CN104153769B (en) * | 2014-07-04 | 2017-01-04 | 中国石油大学(北京) | The division of a kind of fracture-pore reservoir flow unit and evaluation methodology |
| CN110005388A (en) * | 2019-02-11 | 2019-07-12 | 中国石油天然气股份有限公司 | A kind of 3 cun of half Slim Hole fracturing yield increasing method of extra-low permeability oil reservoirs |
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2011
- 2011-12-28 CN CN 201110452849 patent/CN103184868A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104110242A (en) * | 2013-08-30 | 2014-10-22 | 中国石油化工股份有限公司 | Method for increasing extraction rate of later exploitation stage of heterogeneous reservoir |
| CN104110242B (en) * | 2013-08-30 | 2016-09-14 | 中国石油化工股份有限公司 | A kind of method improving heterogeneous reservoir development late stage recovery ratio |
| CN105275457A (en) * | 2014-06-26 | 2016-01-27 | 中国石油化工股份有限公司 | Deployment optimal mode research method for uncompartmentalized oilfield fluvial facies reservoir horizontal well |
| CN104153769B (en) * | 2014-07-04 | 2017-01-04 | 中国石油大学(北京) | The division of a kind of fracture-pore reservoir flow unit and evaluation methodology |
| CN104850732A (en) * | 2014-07-11 | 2015-08-19 | 山东科技大学 | Oil reservoir small layer partitioning method and device based on sand body statistics |
| CN104850732B (en) * | 2014-07-11 | 2018-01-12 | 山东科技大学 | One kind is based on the statistical oil reservoir detail stratigraphic division method and device of sand body |
| CN104809283A (en) * | 2015-04-22 | 2015-07-29 | 中国石油天然气股份有限公司 | Interlayer identification method for heavy oil reservoir |
| CN104809283B (en) * | 2015-04-22 | 2018-04-06 | 中国石油天然气股份有限公司 | A kind of interlayer recognition methods in heavy crude reservoir |
| CN105717541A (en) * | 2016-03-17 | 2016-06-29 | 成都创源油气技术开发有限公司 | Reservoir flow unit dividing method |
| CN110005388A (en) * | 2019-02-11 | 2019-07-12 | 中国石油天然气股份有限公司 | A kind of 3 cun of half Slim Hole fracturing yield increasing method of extra-low permeability oil reservoirs |
| CN110005388B (en) * | 2019-02-11 | 2021-04-30 | 中国石油天然气股份有限公司 | Fracturing and yield increasing method for 3-inch semi-slim well side drilling of ultra-low permeability oil reservoir |
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Application publication date: 20130703 |