Central Projection Southern Rock Accumulation Controlling Factors And Evaluation

"Central projection southern rock Accumulation Controlling Factors and Evaluation " from the central uplift tectonic, sedimentary evolution characteristic analysis, carried out the Qianshan structure, inner structure, transport system, preservation of oil and gas reservoir forming conditions such as research, highlighting the fracture in the formation of traps, reservoir space distribution and pools on oil and gas, source reservoir relationship also has an important influence on the accumulation, eventually established the central bulge of Southern rock solid accumulation model.The study made the following main results and understanding:1. The fracture of the central bulge of Southern rock oil and gas accumulation mainly control. According to the development time, the study of fracture is divided into early, late two, early Indosinian period, Yanshan fracture for fracture, affecting the bedrock of insider and tectonic structure, formed the basic tectonic framework of this region of Qianshan; late faults mainly Himalayan fracture, increased the Qianshan range, forming a regional oil supply window, and formation of present tectonic framework.2. Dawa overseas River fault control south central bulge bedrock reservoir space development, forming a network fracture system, provides the main reservoir space for oil and gas accumulation in this area; at the same time, breaking a certain width formed on the fracture near the band, preservation of bedrock reservoir has some destructive effect.3. Through the research on hydrocarbon accumulation conditions, that the central bulge of Southern rock near the Dawa overseas River fault side forming condition overall is better than that of Qianshan main high structure position, therefore will determine its exploration target zone, and the Qianshan main high structure position is defined as the potential zone. According to the structural characteristics of the main zone can be further divided into detachment fault block, the bedrock of insider type, fault terrace type, slope type four kinds of exploration type, detachment fault block reservoir forming conditions.4. Configurationhydrocarbon source rock and reservoir is an important control factors of oil and gas reservoir rock, source reservoir relationship in this area can be divided into the lower part of contact type, section section completely contact type, section-coated contact type three kinds, source reservoir contact relation to rock oil and gas reservoir with non effect of very important.5. The reservoir characteristics of the study area, rock weathering crust reservoir into massive reservoir and insider layered fractured reservoir two reservoir types for the top, and establish the research area of bedrock three-dimensional reservoir model.6. On the basis of this, the deployment of exploration wells 4, old well re argument on the drilling 1, drilled 2, are good oil and gas shows, and in Zhao Gu 1, Zhao Gu 2 Qianshan reported to the prediction of the petroleum geological reserves of 49520000 tons.