準(zhǔn)噶爾盆地阜北地區(qū)頭屯河組砂巖自生綠泥石特征
本文選題:自生綠泥石 + 頭屯河組 ; 參考:《成都理工大學(xué)學(xué)報(自然科學(xué)版)》2016年04期
【摘要】:自生綠泥石是砂巖儲層中常見的成巖礦物。為了完善碎屑巖儲層黏土礦物研究成果,并對準(zhǔn)噶爾盆地阜北地區(qū)侏羅系頭屯河組油氣勘探提供地質(zhì)依據(jù),通過巖心采樣觀察、鑄體薄片、掃描電鏡、X射線衍射、核磁共振等測試分析手段,對阜北地區(qū)頭屯河組砂巖儲層中自生綠泥石膠結(jié)物的產(chǎn)狀及其對儲層物性的影響進行了研究。結(jié)果表明:頭屯河組砂巖儲層常見自生綠泥石膠結(jié),形成于早成巖階段早期,主要以孔隙襯里式膠結(jié)產(chǎn)出。頭屯河組自生綠泥石包膜對于提高巖石的機械強度和抗壓實能力有限,只有當(dāng)自生綠泥石環(huán)邊呈連續(xù)分布且有一定厚度時,才能抑制石英的次生加大;在保留更多原生孔隙的同時,也堵塞孔喉,導(dǎo)致儲層滲透率降低。頭屯河組自生綠泥石薄膜厚度臨界值為8μm,當(dāng)厚度8μm時,隨著自生綠泥石薄膜厚度增大,對壓實作用的減緩能力越強,儲層物性越好;一旦厚度8μm,自生綠泥石薄膜厚度與儲層物性呈明顯負相關(guān),不利于儲層發(fā)育。
[Abstract]:The authigenic chlorite is a common diagenetic mineral in sandstone reservoirs. In order to improve the research results of clay minerals in the clastic reservoir and provide geological basis for oil and gas exploration in the Jurassic Toutun River formation in Fubei area, the test and analysis methods such as core sampling, casting thin film, scanning electron microscope, X ray diffraction, nuclear magnetic resonance and so on are used. The formation of the authigenic chlorite cementation in the sandstone reservoir of the Toutun River formation in the north area and its influence on the physical properties of the reservoir show that the sandstone reservoirs in the Toutun River formation are usually cemented by the authigenic chlorite and formed in the early stage of the early diagenetic stage, mainly with the pore lining type cementation. The Toutun River formation of the authigenic chlorite coating is used to improve the rocks. The mechanical strength and the resistance to compaction are limited. Only when the edges of the autogenic chlorite are continuously distributed and have a certain thickness, the secondary enlargement of the quartz can be suppressed. While retaining more primary pores, the pore throat is blocked and the permeability of the reservoir is reduced. The critical value of the film thickness of the authigenic green debris in Toutun River group is 8 mu, with the thickness of 8 mu, with the thickness of 8 mu. With the increase of the thickness of the autogenic chlorite film, the stronger the ability to slow down the compaction, the better the reservoir physical property. Once the thickness of 8 mu m, the thickness of the autogenic chlorite film is negatively related to the physical property of the reservoir, which is not conducive to the development of the reservoir.
【作者單位】: 油氣藏地質(zhì)及開發(fā)工程國家重點實驗室(成都理工大學(xué));克拉瑪依紅山油田有限責(zé)任公司;中國石油新疆油田公司實驗檢測研究院;中國石油大學(xué)(北京)克拉瑪依校區(qū);
【基金】:中國石油新疆油田分公司項目(2014-C4032)
【分類號】:P618.13
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