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电梯直达

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发表于 2013-4-16 09:55:55 |只看该作者 |倒序浏览

我的小硕毕业论文，摘要刚写好，达人们能否帮我看下，指出其中的明显错误。
本人英语不好，只好求助广大人民的智慧了。主要是语态、时态，动词、语法等。不胜感激。
In recent years, a series of achievements of oil and gas exploration have been made in the shallow water area of the Pearl River Mouth Basin, as reef oil field has been discovered in Dongsha uplift, some delta and turbidite sandstone oil and gas reservoirs have been found in the Baiyun Sag, but with the exploration degree deepen and the technical level improved, the deep water area gradually comes into people's focus, carbonate rock, especially the reef-bank reservoir, whether develop in deep water area, become one of the hotspots. Individual well in the deep water area has drilled carbonate rocks in the upper Oligocene and lower Miocene, It indicates that the deep water area may exist the reef carbonate rocks development condition. Before finding the favorable reef-bank reservoir face belts, carbonate rocks identification and distribution prediction in the deep water area is necessary. The paper mainly by well-seismic calibration, structure interpretation, palaeogeography analysis and sedimentary facies analysis, pointed out the favorable face belts for carbonate rocks development, and then made a prediction of carbonate rocks distribution in the deep water area.
The main research content and knowledge gained is as follows:
1) Combined with regional geological data, on the basis of the interpretation of seismic data of fault depression layer and depression layer, by time-depth fitting using the drilling data of VSP, and speed analysis, the corresponding relationship between stratigraphic division and seismic horizon in the deep water area of the Pearl River Mouth Basin was established, the target bed's depth and thickness map of Lower Oligocene-Miocene were made. Reflection characteristics and seismic facies of the marine facies and continental facies were analyzed. Combined with single well sedimentary facies profile and cross well sedimentary facies profile in the deep water area, the paleogeographic background was analyzed.
2) Comprehensive analysis of the cross well sedimentary facies profile, progradational reflection, seismic attributes and paleogeography background shows that, in the late Oligocene continental slope belt is located in the south of Baiyun sag, then migrated to the north of the Baiyun sag in the early Miocene. Baiyun sag south, Liwan sag and around uplift in the deep water area in the late Oligocene-early Miocene develop the shallow-sea Delta, turbidite fans, shallow sea carbonate rocks, reefs etc special sedimentary deposits; paleocurrent direction or material source in different periods come from the North East, North West. The far shore shallow water plat areas on the uplift are favorable face belts for carbonate rocks development, regionally near the seismic horizon T6 reflection there is one layer of carbonate rocks deposition widely developed in the lower Miocene.
3) The carbonate reservoir has been drilled in the study area shows the logging response characteristics of low gamma, low acoustic time, lower resistivity, lower density than the skeleton's; and the seismic response characteristics that the top is stable continuous extra strong amplitude and low frequency, the interior is weak or disorder reflection, different from the reflection characteristics of the volcano rock and clastic rock. On the basis of stratigraphic contact relation in the seismic profiles, magma intrusion and volcano activities can be divided into three stages in the study area: Paleogene, Miocene, Pliocene-Quaternary. The amplitude and shape of the volcano rock reflection and carbonate reef-beach reflection is similar, but the volcano rock's amplitude is relatively weaker, often accompanying the fracture phenomenon.
4) It is the first time to identify a reef-bank combination in South Massif in the deep water area in the early Miocene carbonate strata. Combined with the possible development condition of hydrocarbon source rocks, preliminarily discussed its oil and gas reservoir capacity.