【摘要】：針對目的層埋深大、鉆井稀少且分布不均所造成的沉積相研究和砂體預測的難題,以哈薩克斯坦南圖爾蓋盆地Doshan地區(qū)為例,在層序地層學和沉積學研究的基礎上,充分挖掘三維地震數(shù)據的橫向分辨能力,利用90°相位轉換、地層切片、分頻處理等地震沉積學關鍵技術,通過單井相標定地層切片屬性的實際地質意義,應用縱向關聯(lián)的多張地層切片,識別出阿克沙布拉克組(SQ_8層序)至少發(fā)育六期河道,其中SQ_(8-1)旋回內發(fā)育兩期,為河道發(fā)育最廣泛、最強烈的時期;SQ_(8-2)旋回內河道稀疏,縱向連續(xù)性差;SQ_(8-3)旋回河道分布局限,水體范圍縮小,與SQ_(8-1)、SQ_(8-2)相比較具有沉積的繼承性特征,反映出水體深度有所變淺,經歷了一期以水進為主的水進—水退過程。研究表明,地層切片技術有效地描述了河道的平面幾何形態(tài)與不連續(xù)性,這為本區(qū)巖性地層圈閉的描述與預測提供了地質依據。
[Abstract]:In view of the difficult problems of sedimentary facies research and sand body prediction caused by large buried depth, rare drilling and uneven distribution, taking the Doshan area of South Turgai Basin of Kazakhstan as an example, the study of sequence stratigraphy and sedimentology is carried out. Fully excavating the lateral resolution of 3D seismic data, utilizing the key seismic sedimentology techniques such as 90 擄phase conversion, stratigraphic slicing and frequency division processing, calibrating the actual geological significance of stratigraphic slicing attributes through single well facies. By using longitudinally correlated multi-slice stratigraphic slices, the Akshabrak formation (SQ_8 sequence) is identified as developing at least six stages of the channel, in which SQ8-1 cycle develops in two phases, which is the most widely developed and the strongest stage in which the SQ8-2 cycle is sparse. The longitudinal continuity difference between SQ8-3 and SQ8-3 is limited in distribution and the range of water body is reduced. Compared with SQ8-2, SQ8-2 has the inherited characteristics of sedimentation, which shows that the depth of the water body has become shallow, and has experienced a process of water advancing and retreating. The study shows that the stratigraphic slicing technique can effectively describe the plane geometry and discontinuity of the channel, which provides the geological basis for the description and prediction of lithostratigraphic traps in this area.
【作者單位】： 頁巖油氣富集機理與有效開發(fā)國家重點實驗室;中國地質大學(北京)能源學院;中國石化石油勘探開發(fā)研究院;內蒙古礦業(yè)(集團)綠能非常規(guī)天然氣勘查開發(fā)有限責任公司;
【基金】：中國地質大學(北京)科研生產項目“Aryskum坳陷斜坡帶巖性-地層圈閉評價”項目(編號:CNPCIRC-2013-xx)資助
【分類號】：P618.13;P631.4
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本文編號：2191674