【摘要】：柴家河油區(qū)位于鄂爾多斯盆地陜北斜坡東部地區(qū),區(qū)域構(gòu)造為一西傾的單斜,地層傾角小于1°,千米坡降7-10米,單斜背景上局部發(fā)育低幅度鼻狀構(gòu)造。該油區(qū)是橫山采油廠2008年的主力開(kāi)發(fā)和上產(chǎn)區(qū)之一,主力產(chǎn)層為中生界延長(zhǎng)組長(zhǎng)6油層。本次通過(guò)大分層、細(xì)分層對(duì)比,共劃分出1個(gè)油層組、3個(gè)小層；主力小層為長(zhǎng)611和長(zhǎng)612。通過(guò)大量的巖芯觀察、野外剖面調(diào)研以及實(shí)驗(yàn)測(cè)試資料分析,孔隙類型主要為殘余粒間孔及溶蝕粒間孔,成巖作用是影響儲(chǔ)層物性的主要因素,壓實(shí)作用和膠結(jié)作用是導(dǎo)致砂巖物性變差的主要原因。研究區(qū)長(zhǎng)6’儲(chǔ)層段平均孔隙度為11.98%,平均滲透率為0.98×10-3μm2,為中低孔低滲儲(chǔ)層類型。通過(guò)儲(chǔ)層非均質(zhì)性的研究,認(rèn)為儲(chǔ)層物性縱向非均質(zhì)性不強(qiáng)；平面上各小層儲(chǔ)層物性分布集中,孔隙度分布表現(xiàn)為單峰狀,呈正態(tài)分布,滲透率個(gè)別層呈多峰狀分布,說(shuō)明平面分布具有一定的非均質(zhì)性,相對(duì)較高孔較高滲儲(chǔ)層主要分布于主河道發(fā)育區(qū)。從主力油層分布情況研究表明：柴家河油區(qū)長(zhǎng)6’油藏儲(chǔ)層段不長(zhǎng),主力油層集中井段也不長(zhǎng)；單井控制的含油小層數(shù)少、油層厚度��；單井控制儲(chǔ)量低、單井產(chǎn)能低：同時(shí)儲(chǔ)層巖性、物性、流體性質(zhì)也比較接近。在儲(chǔ)集層非均質(zhì)性和孔隙結(jié)構(gòu)研究基礎(chǔ)上,對(duì)研究區(qū)做了“四性”關(guān)系研究,建立了測(cè)井解釋模型來(lái)對(duì)儲(chǔ)層參數(shù)進(jìn)行研究,依據(jù)測(cè)井解釋圖版,確定了研究區(qū)物性下限和電性下限,最后開(kāi)展了研究區(qū)地質(zhì)儲(chǔ)量綜合評(píng)價(jià),研究表明：研究區(qū)長(zhǎng)61油藏探明疊合含油面積5.0km2,探明石油地質(zhì)儲(chǔ)量198.06×104t,可采儲(chǔ)量為22.38×104t,屬小型儲(chǔ)量規(guī)模油田,原油可采儲(chǔ)量豐度為39.4×104m3/km2,屬較高豐度油田,按油藏中深計(jì)算,屬中淺層油藏,按儲(chǔ)層物性分類,屬中低孔低滲油藏。
[Abstract]:The Qaijiahe oil area is located in the eastern part of the northern Shaanxi slope in Ordos basin. The regional structure is a westward dip monoclinal, the stratigraphic dip angle is less than 1 擄, the slope of kilometer is 7-10 meters, and the low-amplitude nasal structure is developed locally in the monoclinal background. The oil area is one of the main development and production areas of Hengshan Oil production Plant in 2008, and the main production zone is Yanchang formation No. 6 of Mesozoic. Through large stratification and subdivision layer correlation, a total of 1 oil layer formation, 3 sub-layers, the main sublayer is Chang611 and Chang612. Through a large number of core observation, field profile investigation and experimental data analysis, the pore types are mainly residual intergranular pores and dissolved intergranular pores, and diagenesis is the main factor affecting reservoir physical properties. Compaction and cementation are the main reasons for the deterioration of sandstone physical properties. The average porosity and permeability of Chang6'reservoir are 11.98 and 0.98 脳 10 ~ (-3) 渭 m ~ (2), respectively. Through the study of reservoir heterogeneity, it is considered that the longitudinal heterogeneity of reservoir physical property is not strong, the distribution of physical properties of each small layer on the plane is concentrated, the distribution of porosity is unimodal, the distribution of porosity is normal distribution, and the permeability of individual layers is multi-peak distribution. It shows that the plane distribution has certain heterogeneity and the relatively high porosity and high permeability reservoirs are mainly distributed in the main river development area. The study on the distribution of the main reservoir shows that the reservoir section of Chang6'reservoir in Chaijiahe oil area is not long, the concentrated well section of the main reservoir is not long, the number of oil-bearing small layers controlled by single well is small, the reservoir thickness is thin, and the control reserve of single well is low. Low productivity of single well: reservoir lithology, physical properties, fluid properties are similar. Based on the study of reservoir heterogeneity and pore structure, the relationship of "four properties" is studied in the study area, and a log interpretation model is established to study reservoir parameters. The lower limit of physical property and the lower limit of electric property of the study area are determined. Finally, the comprehensive evaluation of geological reserves in the study area is carried out. The results show that the proved superimposed oil-bearing area of Chang61 reservoir is 5.0 km ~ 2, the proved petroleum geological reserves are 198.06 脳 10 ~ 4t, recoverable reserves are 22.38 脳 10 ~ 4 t, and the recoverable reserves are 39.4 脳 10 ~ 4 m ~ 3 / km ~ 2, which are calculated according to the depth of the reservoir. It is a medium and shallow reservoir, classified by reservoir physical property, and belongs to low porosity and low permeability reservoir.
【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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