本文選題：吳起-安塞地區(qū) + 長(zhǎng)9、長(zhǎng)10��； 參考：《西安石油大學(xué)》2015年碩士論文

【摘要】：吳起-安塞地區(qū)長(zhǎng)9、長(zhǎng)10油層組屬于典型的低滲透砂巖巖性油藏,隨著勘探開發(fā)投入的不斷增加,已經(jīng)發(fā)現(xiàn)一定規(guī)模的控制儲(chǔ)量及預(yù)測(cè)儲(chǔ)量。然而,目前長(zhǎng)9、長(zhǎng)10儲(chǔ)層的成藏控制因素和富集規(guī)律還不夠明確,嚴(yán)重制約了勘探開發(fā)的深入,需要開展系統(tǒng)的成藏控制因素研究。本文以研究區(qū)長(zhǎng)9、長(zhǎng)10為研究對(duì)象,以層序地層學(xué)、沉積學(xué)和石油地質(zhì)學(xué)為理論指導(dǎo),在廣泛調(diào)研前人研究成果的基礎(chǔ)上,充分利用測(cè)井、巖心觀察、鑄體薄片、壓汞、核磁共振、碳氧同位素、含氮化合物、流體包裹體等一系列分析化驗(yàn)資料,對(duì)長(zhǎng)9、長(zhǎng)10油氣成藏控制因素進(jìn)行系統(tǒng)研究。研究認(rèn)為:長(zhǎng)91發(fā)育三角洲前緣沉積,長(zhǎng)92、長(zhǎng)101發(fā)育三角洲平原沉積,其中長(zhǎng)91、長(zhǎng)101為主力儲(chǔ)層;長(zhǎng)91屬于小孔微喉型儲(chǔ)層,具有相對(duì)“高孔低滲”特征,油源來(lái)自緊鄰的李家畔頁(yè)巖,疏導(dǎo)體系類型為裂縫和孔隙,而長(zhǎng)101屬于小孔微細(xì)喉儲(chǔ)層,具有“低孔高滲”特征,油源來(lái)自工區(qū)西南方向的高阻泥巖,通過超壓開啟同沉積斷層,油氣向下運(yùn)移進(jìn)入長(zhǎng)101砂體,并在長(zhǎng)101砂體內(nèi)發(fā)生順層運(yùn)移,油氣主要在構(gòu)造巖性圈閉和成巖圈閉中成藏;長(zhǎng)9發(fā)育致密油,受烴源巖的生烴強(qiáng)度和儲(chǔ)層質(zhì)量控制,在中西部長(zhǎng)91儲(chǔ)層物性好的地方最為有利;長(zhǎng)10發(fā)育構(gòu)造-巖性油藏,受同沉積斷層溝通的烴源巖性質(zhì)、溝通的砂體特征、砂體連通性、鼻隆構(gòu)造及成巖圈閉的分布綜合控制,在東北部成巖圈閉發(fā)育處最為有利。
[Abstract]:Chang9 and Chang10 reservoirs in Wuqi-Ansai area are typical low-permeability sandstone lithologic reservoirs. With the increasing investment in exploration and development, controlled reserves and predicted reserves on a certain scale have been discovered. However, at present, the controlling factors of reservoir formation and the law of accumulation in Chang9 and Chang10 reservoirs are not clear enough, which seriously restricts the development of exploration and development, so it is necessary to carry out systematic research on the controlling factors of reservoir formation. This paper takes Chang 9 and Chang 10 as research objects, takes sequence stratigraphy, sedimentology and petroleum geology as theoretical guidance, and makes full use of logging, core observation, casting thin slice, mercury injection on the basis of extensive investigation of previous research results. Nuclear magnetic resonance (NMR), carbon and oxygen isotopes, nitrogen compounds, fluid inclusions and a series of analytical and laboratory data were used to study the controlling factors of hydrocarbon accumulation in Chang9 and Chang10. It is considered that Chang91 developed delta front sediments, Chang92and Chang101 developed delta plain deposits, of which Chang91and Chang101 are the main reservoirs, and Chang91 belongs to microlaryngoid reservoirs with relatively high porosity and low permeability. The oil source comes from the adjacent Lijiaban shale, the dredge system type is fracture and pore, while Chang 101 belongs to the microlarynx reservoir with small pore, which has the characteristics of "low porosity and high permeability", and the oil source comes from the high resistivity mudstone in the southwest direction of the working area. Through overpressure opening of synsedimentary fault, oil and gas migrate downward into Chang 101 sand body, and occur along formation migration in Chang 101 sand body. Oil and gas are mainly formed in tectonic lithologic traps and diagenetic traps. Under the control of hydrocarbon generation intensity and reservoir quality of source rock, it is most advantageous where the physical property of Chang91 reservoir is good in the central and western part of China, and Chang10 is developed in tectonic-lithologic reservoir, which is affected by the source rock properties, the characteristics of sand body and the connectivity of sand body, which are communicated with sedimentary faults. The distribution of bibulong structure and diagenetic trap is the most favorable in the northeast diagenetic trap.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13

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