本文選題：深層　切入點(diǎn)：凝析氣藏　出處：《中國地質(zhì)大學(xué)（北京）》2015年博士論文

【摘要】：本論文針對東濮凹陷白廟沙三下氣藏，綜合應(yīng)用地震解釋、儲層預(yù)測、油氣檢測、經(jīng)濟(jì)評價等方法與技術(shù)，完成了水平井挖潛的地質(zhì)、工程、經(jīng)濟(jì)等方面論證，優(yōu)化了井型模式和設(shè)計參數(shù)，提出了有利目標(biāo)區(qū)及井位建議，為探索改善深層低滲凝析氣藏開發(fā)效果的技術(shù)途徑提供了重要依據(jù)。主要成果和認(rèn)識如下： 1、通過地震資料二次處理、小層對比、人機(jī)連作構(gòu)造解釋、砂體展布結(jié)合儲層預(yù)測研究認(rèn)為，氣藏構(gòu)造總體落實(shí)，，沙三下沉積時期，湖底扇中扇水道發(fā)育，在水道內(nèi)及水道交匯區(qū)砂層厚度大、儲層物性好，存在6個有利儲層分布區(qū)，目前資料品質(zhì)下構(gòu)造和儲層描述精度也可達(dá)到設(shè)計要求，具有鉆水平井的地質(zhì)條件。 2、采用通過確定氣井泄氣半徑研究氣藏井網(wǎng)控制儲量的方法，評價了白廟沙三下氣藏剩余未井控潛力，氣藏未井控地質(zhì)儲量達(dá)4.97×108m3，主要集中分布在1、3、5砂組，是鉆水平井挖潛的主要目標(biāo)。 3、對比了目前工藝技術(shù)條件與白廟沙三下氣藏地質(zhì)特征，認(rèn)為目前水平井鉆井、軌跡追蹤與地質(zhì)導(dǎo)向、水平井完井、分段壓裂技術(shù)均較成熟，能夠滿足氣藏地質(zhì)條件及其對鉆完井及壓裂技術(shù)的要求，套管橋塞壓裂、封隔器或固井滑套壓裂是適合該氣藏分段改造的主要工藝，水平井挖潛在工藝技術(shù)是可行的。 4、采用經(jīng)濟(jì)評價方法，計算白廟沙三下單井經(jīng)濟(jì)極限儲量為0.56-0.69×108m3。按氣藏條件測算沙三下水平段井控儲量可超過0.8×108m3，可以獲得經(jīng)濟(jì)效益。單井控制經(jīng)濟(jì)極限儲量與油氣價格、凝析油含量等因素密切相關(guān)，隨著氣價上升，效益會更明顯，水平井挖潛經(jīng)濟(jì)上可行。 5、根據(jù)氣藏地質(zhì)特點(diǎn)，兼顧工藝實(shí)施的難度與可靠性，提出該氣藏水平井可應(yīng)用階梯水平井工藝，實(shí)現(xiàn)對同一斷塊中的兩個氣層或兩個斷塊中的氣層的控制，以獲得最佳的井控儲量，并針對不同斷層與儲層配置關(guān)系，提出了5種水平井部署模式。 6、考慮白廟沙三下層內(nèi)非均質(zhì)性特征、地應(yīng)力分布等，提出水平段在層內(nèi)的位置應(yīng)以穿透目標(biāo)層，保證儲層控制程度為最優(yōu)，水平井最佳軌跡延伸方位在120°-170°，段長600-1000m。綜合構(gòu)造解釋、儲層展布、物性特征、經(jīng)濟(jì)極限及氣藏潛力研究結(jié)果，在沙三下優(yōu)選了5個目標(biāo)區(qū)，提出2口水平井位，實(shí)施后取得了良好的效果。
[Abstract]:Based on the methods and techniques of seismic interpretation, reservoir prediction, oil and gas detection, economic evaluation and so on, the geological, engineering, economic and other aspects of the horizontal well exploitation are demonstrated in this paper for Baimiaosha Sanxia gas reservoir in Dongpu depression. The well pattern and design parameters are optimized, and the favorable target areas and well location suggestions are put forward, which provide an important basis for exploring the technical ways to improve the development effect of deep and low permeability condensate gas reservoirs. The main results and understandings are as follows:. 1. Through the secondary processing of seismic data, small layer correlation, man-machine continuous structural interpretation, sand body distribution combined with reservoir prediction, it is concluded that the gas reservoir structure is generally implemented, and the middle fan waterway of the sublacustrine fan is developed during the period of the lower sand deposition. There are six favorable reservoir distribution areas in the waterway and the intersection area of waterway. The structure and reservoir description precision can meet the design requirements under the data quality at present, and have the geological conditions of drilling horizontal well. 2. By using the method of determining the gas well leakage radius to study the well pattern controlled reserves of the gas reservoir, the remaining unwell control potential of the Baimiaosha 3 lower gas reservoir is evaluated. The unwell controlled geological reserve of the gas reservoir is 4.97 脳 10 8 m 3, which is mainly distributed in the 1 Li 3 5 sand formation. It is the main target of drilling horizontal wells. 3. The present technological conditions and geological characteristics of Baimiaosha Sanxia gas reservoir are compared. It is considered that the drilling, trajectory tracing and geological guidance, horizontal well completion and fracturing techniques are mature at present. It can meet the geological conditions of gas reservoir and the requirements of drilling, completion and fracturing technology. Casing bridge plug fracturing, Packer or cementing sliding casing fracturing are the main techniques suitable for the segmental reconstruction of the gas reservoir, and it is feasible to tap potential in horizontal wells. 4. By using economic evaluation method, the economic limit reserves of Baimiaosha Sanxiao single well are calculated to be 0.56-0.69 脳 108m3. According to the gas reservoir conditions, the well control reserves in the lower horizontal section of SHA3 can exceed 0.8 脳 108m3, and the economic benefits can be obtained. The single well controlled economic limit reserves and oil and gas prices can be obtained. The condensate oil content and other factors are closely related, with the increase of gas price, the benefit will be more obvious. 5. According to the geological characteristics of the gas reservoir and the difficulty and reliability of the process, it is put forward that the horizontal well of the gas reservoir can be controlled by using the step horizontal well technology to control the two gas formations in the same fault block or the gas reservoir in the two fault blocks. In order to obtain the best well control reserves, and according to the relationship between different faults and reservoir configuration, five kinds of horizontal well deployment modes are put forward. 6. Considering the heterogeneity and the distribution of in-situ stress in the lower layer of Baimiaosha, it is proposed that the horizontal section should penetrate the target layer to ensure the optimal reservoir control. The optimum trajectory extension azimuth of horizontal well is 120 擄-170 擄and the length of section 600-1000m.Synthetical structural interpretation, reservoir distribution, physical property characteristics, economic limit and gas reservoir potential are studied. Five target areas are selected and two horizontal well positions are put forward. Good results have been achieved after implementation.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)（北京）
【學(xué)位級別】：博士
【學(xué)位授予年份】：2015
【分類號】：TE372

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本文編號：1662414