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Carboniferous strata - structural traps gas reservoir prediction, classification and evaluation


Figure 141 42), but the two misdiagnoses are more complex and need further work for the earthquake to implement. 3.7 a multi-stratigraphic traps off the same structure as the reservoir tip off contour lines and three or three or more connected together to form the fault of the formation of a structure traps, these traps are likely to anticline or more of the anticline (Figure 2-7 * 1), also monoclinic (Figure 2 ~ 7.2), are generally more complex constructions. And the screen has been Shaguanping a Shapingchang Kam shop two gas reservoir (Figure 1-43 ~ 44), drilling Huanglongchang trap loss (Figure 1-45),[link widoczny dla zalogowanych], the success rate of 66.7. Exploration phase is not yet traps the West (Fig. 1-4G), Temple of the traps in the phase formation of a horst anticline traps gas against the footwall of the West Wing, trap the internal structure of a west dipping monocline, the Temple gas conditions and gas phase is similar to a promise by the gas trap. Closed complex formation ~ 3.8 units fault horst trap limits refer to the anticline or fault zones on both ends of the stack is a complete reservoir pinch-out line cutting, forming a reservoir surrounding strata or faults have been closed composite trap (Figure 2. Such traps are taught as tight containment around oil and gas migration from the bottom up only, lack of catch together on oil and gas from the horizontal capacity of the general section 2l of oil and gas sources for the limited volume has been a door West gas reservoir ( Figure 1-47),[link widoczny dla zalogowanych], South Gate Field gas reservoir located in the western part of the axis of high Lian anticline, tinkling the internal structure of c ring was shaped horst anticline; drill door 3 wells, daily gas production> 100 × 104ril, speculated that the gas enrichment and open-beam uplift mainly caused by the early accumulation of oil and gas are closely related, there is the open beam uplift to the south west side of East Turkistan to the uplift of the Carboniferous reservoir, tend to the West, to the north and south sides of the very tip off favorable for hydrocarbon accumulation relative height of early Himalayan movement formed the western end of the South Gate site just across the barrier anticline and the formation of traps there, leading to early accumulation of oil and gas in place to move but not the whole bulk of the aggregate is now gas reservoir, so although the closure c Ding-style gas reservoir, but the gas is still abundant. There is not a paint Liangbei traps (Figure 1-4, and gas reservoir near the West gate for the two parallel ends of both reverse faults were superimposed lines separate reservoir pinch-type ring closure cc Ding Ding, ring c Ding internal structure for the east-dipping monocline, and the doors of its gas bearing gas reservoirs similar to the West, only a narrow circle c Ding, may be thinner effective thickness of reservoir is the negative factors above,[link widoczny dla zalogowanych], I East River Carboniferous Department of ring formation of a structure c compound Ding, mainly in the open beam uplift surrounding South, North , East, three near the edge of the area remaining, the gas mainly enriched in open beam uplift the success rate of the margin from the point of view, the formation half of the anticlines and stratigraphic closure c tinkling of a fault-type composite circle c Ding the best times for the formation of a nose-shaped anticline, a fault nose anticline formation, formation more than one-off and formation of a complex circle c horst anticline Ding, but were missing the first two laps c Ding reserve has been re-paint is not a priority. Never paint trap of view, to a fault formation and formation of a single ramp anticline fault nose ring c Ding most complex, and the circle c Ding generally larger good,[link widoczny dla zalogowanych], should be the focus of further exploration; followed anticline formation of a nose, a pile of broken strata and stratum ~ horst anticline traps, three traps are also good in the favorable exploration circle c jingling 4 Conclusion Carboniferous formation of a structure traps air gas exploration, and a breakthrough has been made in understanding the total success rate of 65 oil and gas accumulation conditions are better. Ding circle c from the known point of view, there probably is not drilling, indicating great potential, is the Carboniferous one of the main target of further exploration. Even worse in some parts of the area has not been present for digital seismic, with the growing and methods of seismic work continues to improve, I believe there will be a structural stratigraphic traps found optimism. References [1] pay attention were clear. Carboniferous days in East -day East because of the heat accumulation set [J]. Deposition of, 1995.13 (Suppl): l02 ~ 1o8 [2] pay attention were clear. Gaoping Carboniferous sedimentary and stratigraphic division and correlation to find gas significance [knife. Geology, 1985 , 59 (2): 87 ~ 96. _3] Pay attention were clear. East Sichuan in the Carboniferous Huanglong of sedimentary facies by its relationship with the oil and gas [knife. Deposition Technology, 1985,3 (1) 71 ~ 78. [4] Liu Mao and so on. Sedimentary Petrology [M]. Beijing: Geological Publishing House,[link widoczny dla zalogowanych], 1980:219 ~ 221. _5] Liu roots and so on. Carboniferous gas reservoir in the closed conditions of [J]. Chengdu Institute of Technology, 1996,23 (3): 69 ~ 78. [6] pay attention were clear. Collapse of East Sichuan harsh home-made with natural gas exploration field [J]. Petroleum Exploration and Development, 1997,24 (2): 22 ~ 24. ● (Received Date 19981211 Amendment of the 1999-0705 editor Meng Weiming It)
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