致密氣藏開發(fā)井型優(yōu)選研究
發(fā)布時間：2018-08-04 17:05
【摘要】：蘇里格氣田是目前我國探明儲量最大的天然氣氣田,其主力層系石盒子組和山西組的地質(zhì)儲量高達6000×108m3。但是,蘇里格氣田作為我國致密砂巖氣藏的典型代表,其所具有的“低孔、低滲、低豐度、低壓、難動用和非均質(zhì)性強”的特征,嚴重地制約著該地區(qū)天然氣的勘探開發(fā)。由于在增加泄油/氣面積和裂縫鉆遇率,最大限度溝通井筒與儲層之間的氣體流通效果等方面的優(yōu)勢,水平井得到了廣泛應(yīng)用。但隨著“甜點”逐漸消耗殆盡、剩余儲量孔滲條件差、縱橫向上分布復雜、單一水平井型應(yīng)用效果不好等問題日益凸顯,特殊水平井如大位移水平井、多分支水平井和階梯水平井等井型在蘇里格氣田運用的可能性需要進一步探討,從而研究儲層和開發(fā)井型之間的對應(yīng)關(guān)系。 本文以科研項目“致密氣藏開發(fā)井型完井方法優(yōu)化研究”為支撐,開展了蘇里格東區(qū)開發(fā)井型和完井方法的優(yōu)選研究。在調(diào)研現(xiàn)場資料和國內(nèi)外文獻的基礎(chǔ)上,首先根據(jù)儲層分類方法,結(jié)合測井解釋得到的儲層物性參數(shù),對儲層進行分類；之后,在工區(qū)巖石力學參數(shù)實驗和測井資料的基礎(chǔ)上,建立了蘇里格東區(qū)的巖石力學參數(shù)剖面,通過優(yōu)選適合于蘇里格東區(qū)地層壓力和地應(yīng)力的預測模型,建立了地層壓力和地應(yīng)力剖面；然后,基于儲層井壁穩(wěn)定性判斷和出砂預測方法的研究以及不同完井方式的地質(zhì)適應(yīng)性,對完井方式進行了優(yōu)化；同時基于以上理論研究和數(shù)學模型,利用VB6.0可視化語言,編制了適用于蘇里格東區(qū)的完井技術(shù)優(yōu)化和評價軟件。以此,進行了開發(fā)井型地質(zhì)適應(yīng)性研究,研究了水平井產(chǎn)能影響因素,結(jié)合軟件對不同完井方式下的水平井產(chǎn)能進行了評價,實現(xiàn)了蘇里格東區(qū)開發(fā)井型的優(yōu)選。經(jīng)與現(xiàn)場實際的對比研究,驗證了開發(fā)井型和完井方法優(yōu)化理論的可行性和有效性。
[Abstract]:Sulige gas field is the largest proven natural gas field in China at present. The geological reserves of the main strata Shihezi formation and Shanxi formation are as high as 6000 脳 10 ~ 8m ~ 3. However, as a typical representative of tight sandstone gas reservoirs in China, Sulige gas field has the characteristics of "low porosity, low permeability, low abundance, low pressure, hard to produce and strong heterogeneity", which seriously restricts the exploration and development of natural gas in this area. Horizontal wells have been widely used because of their advantages in increasing oil / gas discharge area and fracture drilling rate and maximizing the gas flow effect between wellbore and reservoir. However, with the gradual depletion of "desserts", poor pore and permeability conditions of remaining reserves, complex vertical and horizontal distribution, and poor application effect of single horizontal wells, special horizontal wells, such as long-reach horizontal wells, have become increasingly prominent. The possibility of the application of multi-branch horizontal well and stepped horizontal well in Sulige gas field needs to be further explored so as to study the corresponding relationship between reservoir and development well type. Based on the scientific research project "study on optimization of well completion method for development of tight gas reservoir", this paper has carried out the research on optimal selection of well type and completion method for development in Sulige East District. Based on the investigation of field data and domestic and foreign literature, the reservoir is classified according to the reservoir classification method and the reservoir physical parameters obtained by log interpretation, and then, on the basis of the rock mechanics parameter experiment and logging data in the working area, The rock mechanics parameter profile of Sulige East District is established, and the formation pressure and in-situ stress profile is established by selecting a prediction model suitable for the Sulige East District formation pressure and ground stress. Based on the research of reservoir wellbore stability judgment, sand production prediction method and geological adaptability of different completion methods, the completion method is optimized, and based on the above theoretical research and mathematical model, VB6.0 visualization language is used. A software for optimization and evaluation of completion technology is developed for Sulige East District. On this basis, the geological adaptability of development wells is studied, the factors influencing productivity of horizontal wells are studied, and the productivity of horizontal wells under different completion modes is evaluated with software to realize the optimal selection of development wells in Sulige East District. The feasibility and effectiveness of the development well type and completion method optimization theory are verified by comparing with the field practice.
【學位授予單位】：西南石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE37
本文編號：2164534
[Abstract]:Sulige gas field is the largest proven natural gas field in China at present. The geological reserves of the main strata Shihezi formation and Shanxi formation are as high as 6000 脳 10 ~ 8m ~ 3. However, as a typical representative of tight sandstone gas reservoirs in China, Sulige gas field has the characteristics of "low porosity, low permeability, low abundance, low pressure, hard to produce and strong heterogeneity", which seriously restricts the exploration and development of natural gas in this area. Horizontal wells have been widely used because of their advantages in increasing oil / gas discharge area and fracture drilling rate and maximizing the gas flow effect between wellbore and reservoir. However, with the gradual depletion of "desserts", poor pore and permeability conditions of remaining reserves, complex vertical and horizontal distribution, and poor application effect of single horizontal wells, special horizontal wells, such as long-reach horizontal wells, have become increasingly prominent. The possibility of the application of multi-branch horizontal well and stepped horizontal well in Sulige gas field needs to be further explored so as to study the corresponding relationship between reservoir and development well type. Based on the scientific research project "study on optimization of well completion method for development of tight gas reservoir", this paper has carried out the research on optimal selection of well type and completion method for development in Sulige East District. Based on the investigation of field data and domestic and foreign literature, the reservoir is classified according to the reservoir classification method and the reservoir physical parameters obtained by log interpretation, and then, on the basis of the rock mechanics parameter experiment and logging data in the working area, The rock mechanics parameter profile of Sulige East District is established, and the formation pressure and in-situ stress profile is established by selecting a prediction model suitable for the Sulige East District formation pressure and ground stress. Based on the research of reservoir wellbore stability judgment, sand production prediction method and geological adaptability of different completion methods, the completion method is optimized, and based on the above theoretical research and mathematical model, VB6.0 visualization language is used. A software for optimization and evaluation of completion technology is developed for Sulige East District. On this basis, the geological adaptability of development wells is studied, the factors influencing productivity of horizontal wells are studied, and the productivity of horizontal wells under different completion modes is evaluated with software to realize the optimal selection of development wells in Sulige East District. The feasibility and effectiveness of the development well type and completion method optimization theory are verified by comparing with the field practice.
【學位授予單位】：西南石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE37
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