米倉山前緣震旦系燈影組油氣前景探討
發(fā)布時間：2018-07-25 08:34
【摘要】：米倉山前緣地區(qū)震旦系燈影組是油氣勘探的重要層位,本文以天星1井和南江楊壩剖面為重點,結(jié)合前人研究資料,分析米倉山前緣地區(qū)震旦系燈影組烴源巖發(fā)育特征、儲層發(fā)育特征、瀝青發(fā)育特征和油氣保存條件,探討米倉山前緣地區(qū)震旦系燈影組油氣勘探前景。米倉山前緣地區(qū)下寒武統(tǒng)筇竹寺組是震旦系燈影組的主力烴源巖,為陸棚沉積環(huán)境下的黑色炭質(zhì)頁巖、粉砂質(zhì)泥巖夾泥質(zhì)粉砂巖,有機質(zhì)類型為I型,處于過成熟階段,鏡質(zhì)體反射率呈現(xiàn)東高西低的分布特征,東南緣貴民和楠木樹地區(qū)最高(Ro3.0%),西南緣青竹園和楊壩地區(qū)最低(Ro1.5%)。有機質(zhì)豐度較低(天星1井平均值為1.21%,楊壩剖面平均值2.34%),呈現(xiàn)出北高南低,從山到盆逐漸減小,沿米倉山基底隆起周緣從東西兩側(cè)向中部逐漸減小的分布特征。有效烴源巖厚度大(天星1井厚269m,楊壩剖面厚173m),呈現(xiàn)出西北厚東南薄的分布特征。整體上米倉山基底隆起西南緣天星1井地區(qū)烴源巖發(fā)育最好,南江橋亭、貴民地區(qū)其次。米倉山前緣地區(qū)震旦系燈影組儲層主要發(fā)育在燈影組2段和燈影組4段。燈影組2段巖性主要為葡萄石白云巖、含礫屑砂屑白云巖、紋層狀白云巖、藻團粒白云巖、疊層石白云巖和硅質(zhì)白云巖�？紫犊臻g類型為晶間(微)孔、溶蝕孔、裂縫和順層發(fā)育的溶洞,形成晶間(微)孔—溶蝕孔—裂縫型和溶孔溶洞型儲集空間組合類型;燈影組4段巖性主要為砂屑白云巖、疊層石白云巖、紋層狀白云巖、凝塊石白云巖和微晶白云巖�？紫犊臻g類型為晶間(微)孔、粒間孔、溶蝕孔、格架孔和構(gòu)造破裂縫,形成晶間(微)孔—粒間孔—溶蝕孔—裂縫型儲集空間組合類型,儲集空間以構(gòu)造破裂縫為主。儲層物性較低,孔滲相關(guān)系數(shù)小,儲層類型為裂縫型、孔隙—裂縫型�？v向上,燈影組4段儲層為更好的有利儲層段。橫向上,米倉山基底隆起西南緣天星1井地區(qū)為研究區(qū)較好的儲層發(fā)育區(qū)。米倉山前緣地區(qū)震旦系燈影組儲層瀝青普遍發(fā)育�？v向上,瀝青主要發(fā)育于燈影組4段,燈影組2段僅頂部發(fā)育少量瀝青,且含量明顯少于燈影組4段,具有明顯的上部層段連續(xù)集中、充填率高、向下逐步分散發(fā)育、充填率低的特點。燈影組4段瀝青主要發(fā)育在頂部0~80m范圍內(nèi),其次為中部距頂90~220m,底部發(fā)育最差;橫向上,瀝青含量分布整體呈現(xiàn)圍繞米倉山基底隆起向四周逐漸減少的變化趨勢。米倉山前緣地區(qū)蓋層發(fā)育齊全,主要包括下寒武系筇竹寺組泥巖、下志留統(tǒng)龍馬溪組泥巖、下—中三疊統(tǒng)雷口坡組、嘉陵江組膏鹽巖和上三疊統(tǒng)—侏羅系泥巖。具有發(fā)育厚度大且穩(wěn)定,連續(xù)性好,物性致密的特征。這為燈影組儲層提供了良好的靜態(tài)保存條件。米倉山南緣滑脫褶皺帶震旦系燈影組儲層雖具備良好的儲源條件,并曾形成過大規(guī)模古油藏,但上覆蓋層遭受了嚴(yán)重的構(gòu)造隆升剝蝕作用和斷層切割作用,已不具有油氣保存能力。因此,該地區(qū)不具備油氣勘探前景。而川北拗陷盆地疊加褶皺帶東南緣的通南巴背斜震旦系燈影組儲源條件較米倉山南緣滑脫褶皺帶差,但保存條件完好,具有良好的油氣勘探前景。
[Abstract]:The Sinian Dengying Formation in the front of Cangshan is an important horizon for oil and gas exploration. This paper, focusing on the Tianxing 1 well and the Nanjiang Yang Ba section, analyzes the characteristics of the development of the source rocks of the Sinian Dengying Formation, the characteristics of the reservoir development, the characteristics of the development of the asphalt and the preservation conditions of the oil and gas, and discusses the area of the front edge of the rice Cangshan. The lower Cambrian formation in the front edge of the Sinian system is the main source rock of the Sinian Dengying group, which is the main source rock of the Dengying group of the Sinian system, the black carbonaceous shale in the shelf sedimentary environment, the silty siltstone with silty mudstone and the type of organic matter I, which is in the over mature stage, and the vitrinite reflectivity presents the distribution characteristics of the East High West low. The highest (Ro3.0%) and the lowest (Ro1.5%) in the southwest edge of the green bamboo garden and the Yang Ba area in the south-east edge (Ro1.5%). The abundance of organic matter is low (the average value of Tianxing 1 is 1.21%, the average of Yang Ba section is 2.34%), showing the North High South low, gradually decreasing from the mountain to the basin, and gradually decreasing along the East and west sides of the basement uplift of Cangshan. The effective hydrocarbon source rocks are thick (the thickness of Tianxing 1 well 269M, the thickness of Yang Ba section 173m), showing the distribution characteristics of the northwest thick and southeastern thin. In the southwest edge of the southwest edge of the m Cangshan basement uplift, the source rock is the best, the Nanjiang Bridge pavilion, the second. The Sinian Dengying Formation in the Sinian system of the front edge of the rice Cangshan is mainly developed in 2 sections of the Dengying group and the lamp. The lithology of the 2 section of the shadow group is mainly grape dolomite, including gravel sand debris dolomite, lamellar dolomite, algal pellet dolomite, stinite dolomite and siliceous dolomite. The pore space type is intergranular (micro) hole, dissolution hole, crack and CIS formation cave, forming intergranular (micro) hole, corrosion hole to fissure type and dissolution hole type. The 4 sections of the Dengying group are mainly sand debris dolomite, stratlite dolomite, lamellar dolomite, clot dolomite and microcrystalline dolomite. The pore space type is intergranular (micro) pore, intergranular pore, dissolution hole, lattice hole and structural fracture, and forms intergranular (micro) pore, intergranular pore and dissolution pore reservoir space group. The reservoir space is mainly composed of structural fracture, low reservoir physical property, small pore permeability correlation coefficient, fractured reservoir type and pore fracture type. Longitudinally, the 4 section of the Dengying Formation is a better reservoir section. Horizontally, the Tianxing 1 well area in the southwest margin of the Cangshan basement uplift is a better reservoir development area in the study area. The front edge of rice Cangshan The asphalt is widely developed in the Dengying Formation of the Sinian system in the area. In the longitudinal direction, the asphalt is mainly developed in 4 sections of the Dengying group. The 2 section of the Dengying group has only a small amount of bitumen in the top, and the content is obviously less than the 4 section of the light shadow group. It has the characteristics of the continuous concentration of the upper section, the high filling rate, the downward gradual dispersion and development, and the low filling rate. The main hair of the 4 sections of the shadow group is the main hair. In the top 0~80m range, the second is the middle distance to the top 90~220m, and the bottom development is the worst. On the horizontal side, the distribution of bitumen content is around the trend of decreasing gradually around the basement uplift of rice Cangshan. The cover layer of the front of the rice Cangshan is fully developed, mainly including the mudstone of the lower Cambrian bamboo Temple group, the Lower Silurian Long Ma Creek mudstone, lower - The middle three series of Lei Kou slope formation, Jialing River group plaster salt rock and upper three series Jurassic mudstone are characterized by large and stable development thickness, good continuity and dense physical property. This provides good static storage conditions for the reservoir of the Dengying Formation. Although the Sinian Dengying reservoir in the southern margin of the Southern margin of Cangshan has good storage conditions and has been formed. The upper covering layer has been subjected to severe tectonic uplift and erosion and fault cutting, and it does not have oil and gas preservation ability. Therefore, the area does not have the prospect of oil and gas exploration. The source conditions of the Dengying Formation in the Sinian system of the Tongnan Ba anticline in the southeastern margin of the superimposed fold belt in the North Sichuan depression basin are more than that of the southern margin of Cangshan. The wrinkled zone is poor, but the preservation condition is intact. It has good prospects for oil and gas exploration.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13
本文編號：2143236
[Abstract]:The Sinian Dengying Formation in the front of Cangshan is an important horizon for oil and gas exploration. This paper, focusing on the Tianxing 1 well and the Nanjiang Yang Ba section, analyzes the characteristics of the development of the source rocks of the Sinian Dengying Formation, the characteristics of the reservoir development, the characteristics of the development of the asphalt and the preservation conditions of the oil and gas, and discusses the area of the front edge of the rice Cangshan. The lower Cambrian formation in the front edge of the Sinian system is the main source rock of the Sinian Dengying group, which is the main source rock of the Dengying group of the Sinian system, the black carbonaceous shale in the shelf sedimentary environment, the silty siltstone with silty mudstone and the type of organic matter I, which is in the over mature stage, and the vitrinite reflectivity presents the distribution characteristics of the East High West low. The highest (Ro3.0%) and the lowest (Ro1.5%) in the southwest edge of the green bamboo garden and the Yang Ba area in the south-east edge (Ro1.5%). The abundance of organic matter is low (the average value of Tianxing 1 is 1.21%, the average of Yang Ba section is 2.34%), showing the North High South low, gradually decreasing from the mountain to the basin, and gradually decreasing along the East and west sides of the basement uplift of Cangshan. The effective hydrocarbon source rocks are thick (the thickness of Tianxing 1 well 269M, the thickness of Yang Ba section 173m), showing the distribution characteristics of the northwest thick and southeastern thin. In the southwest edge of the southwest edge of the m Cangshan basement uplift, the source rock is the best, the Nanjiang Bridge pavilion, the second. The Sinian Dengying Formation in the Sinian system of the front edge of the rice Cangshan is mainly developed in 2 sections of the Dengying group and the lamp. The lithology of the 2 section of the shadow group is mainly grape dolomite, including gravel sand debris dolomite, lamellar dolomite, algal pellet dolomite, stinite dolomite and siliceous dolomite. The pore space type is intergranular (micro) hole, dissolution hole, crack and CIS formation cave, forming intergranular (micro) hole, corrosion hole to fissure type and dissolution hole type. The 4 sections of the Dengying group are mainly sand debris dolomite, stratlite dolomite, lamellar dolomite, clot dolomite and microcrystalline dolomite. The pore space type is intergranular (micro) pore, intergranular pore, dissolution hole, lattice hole and structural fracture, and forms intergranular (micro) pore, intergranular pore and dissolution pore reservoir space group. The reservoir space is mainly composed of structural fracture, low reservoir physical property, small pore permeability correlation coefficient, fractured reservoir type and pore fracture type. Longitudinally, the 4 section of the Dengying Formation is a better reservoir section. Horizontally, the Tianxing 1 well area in the southwest margin of the Cangshan basement uplift is a better reservoir development area in the study area. The front edge of rice Cangshan The asphalt is widely developed in the Dengying Formation of the Sinian system in the area. In the longitudinal direction, the asphalt is mainly developed in 4 sections of the Dengying group. The 2 section of the Dengying group has only a small amount of bitumen in the top, and the content is obviously less than the 4 section of the light shadow group. It has the characteristics of the continuous concentration of the upper section, the high filling rate, the downward gradual dispersion and development, and the low filling rate. The main hair of the 4 sections of the shadow group is the main hair. In the top 0~80m range, the second is the middle distance to the top 90~220m, and the bottom development is the worst. On the horizontal side, the distribution of bitumen content is around the trend of decreasing gradually around the basement uplift of rice Cangshan. The cover layer of the front of the rice Cangshan is fully developed, mainly including the mudstone of the lower Cambrian bamboo Temple group, the Lower Silurian Long Ma Creek mudstone, lower - The middle three series of Lei Kou slope formation, Jialing River group plaster salt rock and upper three series Jurassic mudstone are characterized by large and stable development thickness, good continuity and dense physical property. This provides good static storage conditions for the reservoir of the Dengying Formation. Although the Sinian Dengying reservoir in the southern margin of the Southern margin of Cangshan has good storage conditions and has been formed. The upper covering layer has been subjected to severe tectonic uplift and erosion and fault cutting, and it does not have oil and gas preservation ability. Therefore, the area does not have the prospect of oil and gas exploration. The source conditions of the Dengying Formation in the Sinian system of the Tongnan Ba anticline in the southeastern margin of the superimposed fold belt in the North Sichuan depression basin are more than that of the southern margin of Cangshan. The wrinkled zone is poor, but the preservation condition is intact. It has good prospects for oil and gas exploration.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13
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