1、毕业论文设计文献翻译地质工程方面中英文对照Formation Mechanism and Distribution of Paleogene-Neogene Stratigraphic Reservoirs in Jiyang Depression Abstract During Paleogene-Neogene period, multiple scale unconformities had been formed in Jiyang depression, which provided favorable conditions for stratigraphic reservoirs.
2、 In recent years, various Paleogene-Neogene stratigraphic reservoirs in Jiyang depression have been found, and proved reserves were rising significantly, which fully showed a great exploration potential for this kind of reservoirs. But the practice of exploration in recent years indicated that the u
3、nconformities carrier system and its ability of sealing, petroleum migration and its accumulation model, distribution of stratigraphic reservoirs are uncertain, which deeply restrict the exploration degree of stratigraphic reservoirs in Jiyang depression Based on the analysis of a large number of ex
4、ploration wells and seismic data for Typical reservoirs, the paper analyses unconformities construct and its effect to generation in the PaleogeneNeogene, and summarize the distribution pattern of stratigraphic reservoirs based on petroleum mechanism and accumulation model. Finally, a highly quantit
5、ative prediction modclof height of pools in stratigraphic reservoirs was established, the research results effectively guided the explorationPra- ctice of stratigraphic reservoir . There are four macro unconformity types of PaleogeneNeogene formation which including truncation-overlap, truncationpar
6、allel, paralleloverlap and paralel unconformity in Jiyang depression.Besides truncation-overlap unconformity lies in slopes of depression, and parallel unconformity developed inside of depression,another two types lie in local areas. Unconformity can be developed vertically three-layer structure whi
7、ch including unconformity roof rock, weathered clay layer and semi-weathered rock. It also Can be twolayer structure if without weathered clay layer.And part of semiweather rock Can be form a hard shell accuse of its filling process during the later stage. Geological characteristic of the structure
8、layer of unconformity is different in lithology,mineralogy, element geochemistry and weather degree index. Based on optimal partition of sequential number and principal component analysis, logging quantification recognition method about unconformity structure layers were established, on which effect
9、ive identification of unconformitystnlcture layers can bu achieved in the case of no rock core. The formation of various unconformity structure types is related to many factors such as, parent rock lithology, interval of deposition hiatus, palaeotopography,and preservation conditions, which aretoget
10、her to control spatial distributions of unconformity structure types . Macro styles and its vertical structure of unconformity can be effected as a blocking, reservoir, trap or carrier system.Blocking affection to fluid depends on weathered clay layer,hard shell of semi-weathered rock and mudstone.
11、So petroleum migration and accumulation units is relatively independence above and belowunconformity if structure layers mentioned above existed. Reservoir affection is due to permeable rock, including roof sandstone .Semi-weathered sandstone, semi-weathered carbonate rock, semiweathered igneous roc
12、k and semi-weathered metamorphic. Trapcontrolling affection related to macro unconformity type and its juxtapose to permeability and impermeability rock above and below unconformity. It is easy to develop stratigraphy traps where the permeability and impermeability beds juxtapose in a truncation-ove
13、rlap unconformity, where up permeability and down impermeability in parallel-overlap unconformity, and down permeability and up impermeability beds juxtapose in a truncation-parallel. Transporting affection is owing to lateral continuity of permeable rock of unconformity. In a terrestrial rift basin
14、, petroleum migration in transverse or vertical short distance in local area, and is not conducive to petroleum long distance along unconformity, because interbedding pattern of mudstone and sandstone is dominated, and its physical property of mudstone improved poorly . Because of the long distance
15、from resource to trap, migration and accumulation procese is very complicated. Accumulation process of Paleogene-Neogene stratigraphic traps can be summarized as following:allochthonous source rock , compound transportation , later period charging, buoyancy and pressure conversion driving for accumu
16、lation, and blocking by non-permeable layer of unconformity, Trap types and its distribution are controlled by unconformity structure styles. Petroleum distribution and its scale are controlled by generating ability of Source rock. Petroleum accumulation area is decided by positive tectonic units. I
17、f carrier system existed , oil column of stratigraphic reservoirs is effected by four main factors which including generation expulsion quantity,migrating distance, dip angle and capillary resistance of carrier layer. Based on the analysis of single factor, the prediction model of height of oil colu
18、mu through multifactor regressions was established . Based on the model , the paper defruited favorable areas, which reserves in these areas exceed 1.5 x 1 08t . Research results of the paper combined closely with exploration practice, and according to previous research results,31 exploration wells
19、had been drilled, which of them 17 wells were successfully from 2006 to 2009. There is accumulation proved reserves Was up to 2362x104t. and predict reserves was to 3684x104t .Keywords:Paleogene; Neogene; unconformity stratigraphie reservoirs; Fomation mechanism; distribution pattern; Jiyang depress
20、ion1. Preface1.1 Foundationnd and signifacance of the topic1.1.1 Theme origin The theme is from the Sinopcc project:Forming and distribution of Tertiarystratigraphic reservoir of Jiyang depression . Theme number:P06012,deadline:2006-20081.1.2 Foundation and baekground of the theme The tectonic event
21、s frequently occurred in Jiyang depression in paleogene-NeogeneIt was favour of forming stratigraphic reservoir because of existence of several kinds of unconformity . Based on statistical data , beneficial area reservoired oil is about 9500km2, and the remaining resource is about 16x 108t in strati
22、graphic reservoirs of paleogene-Neogene stratasSince 1980s,many overlap and unconformity reservoirs have been founded , explored reserves Was apparently increased with deep exploring. By the end of 2006 , explored resource had been up to 3.7108t which showed a large exploring potential. But , in fac
23、t , the research on stratigraphic reservoir is lack or Uttle , especially,Accumulation pattern and forecasting model of oil have not been studied systematically. For example , the successful ratio of exploration well testing which is the lowest in allkinds reservoirs Was only 35.7about stratigraphie
24、 reservoir in paleogene-Neogene in Jiyang depression from 2001-2005 . The main loss reason for the overlap andunconformity reservoirs exploration is migration and trap of oil that is separently53.5and 23.9.Hereby , oil migration problem and trap validity are importantaspects for overlap and unconfor
25、mity reservoir exploring. In short,it has three aspects as followed: (1)Shallow comprehension about conduction of ability of unconformityResearch on unconformity in present indicated that it is not a simple surface three-dimension body which is important for migration of oil and gasThere has some de
26、ep knows about the basins in west China and the marine basins in China. The systematic theory is lack about structure characteristic which deeply affect accumulating oil and gas. (2)The remain uncertain migration and accumulation process of oil and gas about stratigraphic reservoir remain uncertain
27、. Stratigraphic reservoir lay in edge of basin . So it is difficult to exactly hold accumulation regular of oil and gas because far distance traps and hydrocarbon resources make a complicated migration process. (3)Forecasting model of stratigraphic reservoir that could be used to guide explore is la
28、ck It is necessity to finely evaluate and explore stratigraphic reservoir along with degree of exploration. Mayor controlling factors remain uncertain in construction offorecasting model of stratigraphic reservoirs.1.1.3 Aim, sense and application value of theme The study resolves the problem of sta
29、tigraphic reservoir formation and distribution of Paleogene-Neogene in Jiyang depression. By analysis of uniformity structure, their affect on statigraphic reservoir formation will be identify; The accumulation model will be established through study on static geologic characteristic of statigraphic
30、 reservoir ; Forecast mode of oil extent will be achieved through research on oil extent and to predict oil quality. Research results Can not only be used to effectively guide statigraphic reservoirExploring, to raise drilling Success ratio, provide technical support for increasing oilproduction of
31、the Sinopec, and also provide reference to statigraphic reservoir exploring of Bohai Bay area . Research will enormously deepen statigraphic reservoir accumulation regular and further enrich and improve subtle reservoir exploring theory .1.2 Research present at home and abroad1.2.1 Present research
32、and development at home and abroadUnconformity reservoir is one of important exploring object since Levorsen proposed the concept of stratigraphic trap and then published paper onStratigraphic oil field ” in 1 936It turns into stratigraphic reservoir and lithology reservoir based on scholars deepenl
33、y research the Levorsen stratigraphic eservoir . Stratigraphic trap is formed as a result of the updip reservoir directly contigence with unconformity above. According to trap place, accurrence and barrier, stratigraphic oil pools is divided into overlap pool, unconformity barbered pool and ancient bu
copyright@ 2008-2022 冰豆网网站版权所有
经营许可证编号:鄂ICP备2022015515号-1