本文關(guān)鍵詞：薩北X區(qū)東部過渡帶薩爾圖油層儲(chǔ)層預(yù)測(cè)研究　出處：《東北石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 薩北開發(fā)區(qū) 精細(xì)層位解釋 地震反演 屬性融合 沉積微相

【摘要】：隨著薩北開發(fā)區(qū)進(jìn)入勘探開發(fā)高含水后期階段,剩余經(jīng)濟(jì)可采儲(chǔ)量的開發(fā)難度不斷增加,儲(chǔ)層精細(xì)描述受井網(wǎng)密度低、砂體發(fā)育相對(duì)較差等影響,識(shí)別效率不高,預(yù)測(cè)效果不好。因此,亟需開展井震結(jié)合儲(chǔ)層預(yù)測(cè)研究,最大限度地發(fā)揮地震資料橫向預(yù)測(cè)能力,探索井震結(jié)合技術(shù)的適應(yīng)性,滿足開發(fā)調(diào)整需求。本論文以薩北開發(fā)區(qū)東部過渡帶薩爾圖油層為研究區(qū)域,以地震資料與測(cè)井資料為基礎(chǔ),以描述薩爾圖油層十八個(gè)沉積單元的沉積微相及河道展布規(guī)律為目的,重點(diǎn)開展了研究區(qū)目的層的層位精細(xì)解釋、地質(zhì)統(tǒng)計(jì)學(xué)反演與屬性融合研究。主要細(xì)分為:(1)基于井震一致性的思想,在井點(diǎn)巖性標(biāo)定的基礎(chǔ)上開展精細(xì)解釋,落實(shí)小層位置,保證解釋的準(zhǔn)確性。(2)基于測(cè)井曲線的不同頻率尺度反應(yīng)不同沉積特征的特點(diǎn),開展研究區(qū)各沉積單元各向異性多概率地質(zhì)統(tǒng)計(jì)學(xué)反演工作,預(yù)測(cè)各小層的橫縱向砂體展布規(guī)律與連通情況,通過抽稀驗(yàn)證反演結(jié)果準(zhǔn)確性。(3)開展薩爾圖油層正演模擬研究,通過建立河道砂體組合地質(zhì)模型,分析不同砂巖特征下各屬性敏感性,通過正演分析確定屬性優(yōu)選結(jié)果。(4)以井點(diǎn)進(jìn)行相關(guān)性分析及權(quán)重比的選擇為基礎(chǔ)進(jìn)行屬性融合研究,根據(jù)融合地震相結(jié)果及測(cè)井?dāng)?shù)據(jù)精細(xì)描述沉積微相,研究河道特征及河道變化。研究表明,研究區(qū)西南高,東北低,整體上層位平緩且無復(fù)雜構(gòu)造或斷裂。經(jīng)過井震結(jié)合精細(xì)層位標(biāo)定識(shí)別了S1、S2、S3以及P1四個(gè)反射層。反演成果對(duì)儲(chǔ)層砂體刻畫可信度高,縱向分辨率較好。優(yōu)選后的屬性與反演成果融合可以作為河道刻畫與沉積微相繪制的有效手段。通過對(duì)各個(gè)沉積單元鉆遇河道井點(diǎn)開展符合率情況統(tǒng)計(jì)得出,河道預(yù)測(cè)符合率能到達(dá)到80%以上,河道砂微相預(yù)測(cè)符合率提高10%以上,完成了對(duì)各個(gè)沉積單元的沉積微相特征與河道變化的全面認(rèn)識(shí),從而為砂體發(fā)育較差的砂泥薄互層儲(chǔ)層的預(yù)測(cè)提供了有利的研究思路。
[Abstract]:With the later stage of high water cut in Sabei Development Zone, the development difficulty of remaining economic recoverable reserves is increasing, and the fine reservoir description is affected by low well pattern density and relatively poor sand body development. The identification efficiency is not high, and the prediction effect is not good. Therefore, it is urgent to carry out the research of reservoir prediction combined with well and earthquake, to maximize the lateral prediction ability of seismic data, and to explore the adaptability of well shock combination technology. To meet the needs of development adjustment. This paper takes the Saartu oil layer in the eastern transitional zone of Sabei Development Zone as the research area, based on seismic data and logging data. In order to describe the sedimentary microfacies and channel distribution of 18 sedimentary units in Saltu reservoir, the fine interpretation of the target layer in the study area is carried out. The research of geostatistical inversion and attribute fusion. The main subdivision is: 1) based on the idea of well seismic consistency, the fine interpretation is carried out on the basis of well point lithology calibration, and the location of small layers is implemented. To ensure the accuracy of interpretation. (2) based on the characteristics of different frequency scales of log curves reflecting different sedimentary characteristics, the anisotropic multi-probability geostatistical inversion of sedimentary units in the study area is carried out. To predict the distribution and connectivity of the horizontal and longitudinal sand bodies of each sublayer, the accuracy of inversion results is verified by pumping. 3) the forward modeling of Saltu reservoir is carried out, and the geological model of channel sand body assemblage is established. The sensitivity of each attribute under different sandstone characteristics is analyzed, and the result of attribute optimal selection is determined by forward modeling. (4) based on the correlation analysis of well points and the selection of weight ratio, attribute fusion research is carried out. According to the fusion seismic facies results and logging data, the sedimentary microfacies are accurately described, and the channel characteristics and channel changes are studied. The results show that the southwest of the study area is high and the northeast of the study area is low. The whole upper layer is flat and without complex structures or faults. The four reflection layers S1S2S3 and P1 are identified by well earthquakes and fine horizon calibration. The inversion results have high credibility for the characterization of reservoir sand bodies. The fusion of attributes and inversion results after optimal selection can be used as an effective means of channel characterization and sedimentary microfacies mapping. The predicted coincidence rate of channel prediction can reach more than 80%, and the prediction coincidence rate of channel sand microfacies can be increased by more than 10%. The comprehensive understanding of sedimentary microfacies characteristics and channel changes of each sedimentary unit has been completed. This provides a favorable research idea for the prediction of sand and mud thin interbed reservoirs with poor development of sand bodies.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P618.13

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本文編號(hào)：1401390