塔里木盆地新和地区中生界地震烃类检测及有利圈闭预测
发布时间：2018-08-09 11:00
【摘要】：新和地区位于新疆塔里木盆地北部的天山南地区,构造上处于库车坳陷与沙雅隆起两大构造单元的结合区域,是断裂发育和油气聚集的重点区带。然而中国石化前期在新和地区针对大型构造圈闭的勘探结果不佳,使得在该地区应用地震烃类检测技术开展隐蔽圈闭预测就显得尤为必要。本次论文在前人研究的基础上,从构造及沉积相分析出发,利用地震烃类检测技术预测了新和地区中生界目的层位的能量衰减异常区,并从石油地质条件聚焦分析了异常区油气成藏的可能性。当地层含有烃类尤其是含气时,会导致地层的吸收衰减系数变大,地震波通过时,会表现出“低频共振,高频衰减”的特征。通过离散傅里叶变换将时间域的新和三维地震数据体分为频率域间隔5Hz的离散能量数据体,以开展针对中生界目的层位的烃类检测。新和地区库车坳陷内的三叠系目的层位哈拉哈塘组存在含油气有利区,其油气主要来自库车坳陷内部三叠系的陆相烃源岩,由坳陷内部运移至构造斜坡带,并在哈拉哈塘组顶部的泥岩盖层封堵和高部位断裂遮挡的作用下,使得油气赋存于三叠系哈拉哈塘组的砂岩储层中,存在形成受断裂、构造和岩性共同控制的复合圈闭油气藏的可能。新和地区白垩系的目的层位巴西盖组与舒善河组上段存在含油气有利区,其油气主要来自寒武系至奥陶系的主力烃源岩,并在浅层的白垩系走滑拉分扭张断裂体系作用下,沿断裂通道或不整合面运移至浅层的巴西盖组和舒善河组有效储层,并在上覆巴西盖组顶部泥岩封堵及构造高部位断裂遮挡的作用下,存在形成受断裂、构造和岩性共同控制的复合圈闭油气藏的可能。本次论文研究所应用的地震烃类检测技术在新和地区的可适用性验证及其预测结果对在塔里木盆地北部的新和地区乃至整个天山南地区寻找隐蔽圈闭油气藏具有重要的指导意义。
[Abstract]:Xinhe area is located in Tianshannan area in northern Tarim Basin, Xinjiang. It is located in the combination area of Kuqa depression and Shaya uplift, and is the key zone of fault development and oil and gas accumulation. However, in the early stage of Sinopec, the exploration results of large-scale structural traps in Xinhe area are not good, so it is necessary to use seismic hydrocarbon detection technology to predict subtle traps in this area. On the basis of previous studies, based on the structural and sedimentary facies analysis, the energy attenuation anomaly area of the Mesozoic target horizon in the Neo-Hehe area is predicted by using seismic hydrocarbon detection technique. The possibility of oil and gas accumulation in anomalous areas is analyzed from petroleum geological conditions. When the layer contains hydrocarbon, especially gas, the absorption and attenuation coefficient of the formation will become larger. When the seismic wave passes through, it will show the characteristic of "low frequency resonance and high frequency attenuation". The new and three-dimensional seismic data volumes in time domain are divided into discrete energy data volumes of 5Hz in frequency domain by discrete Fourier transform to detect hydrocarbons for Mesozoic target horizon. There is a favorable oil-gas bearing area in the Triassic target horizon of Ha-Hattang formation in Xinhe area, which mainly comes from the continental source rocks of Triassic in Kuqa depression, and migrates from the internal depression to the structural slope zone, and the oil and gas mainly come from the continental source rocks of the Triassic in the Kuqa Depression. Under the action of mudstone caprock plugging at the top of the Hafatang formation and fault occlusion at the high position, the oil and gas exists in the sandstone reservoir of the Triassic Hala Hattang formation, and the formed fault exists. The possibility of complex traps controlled by structure and lithology. The target strata of the Cretaceous in the Xinhe area are the Brazilian cap formation and the upper part of the Shushanhe formation, which are favorable for oil and gas, mainly from the main source rocks from Cambrian to Ordovician, and under the action of the shallow Cretaceous strike-slip extensional and tensional fault system. Along the fault channel or unconformable surface, the effective reservoirs of the Brazilian cap formation and the Shushanhe formation are migrated to the shallow layer, and under the action of sealing the mudstone at the top of the overlying Brazil cap formation and blocking the faults at the high part of the structure, there are formed faults. The possibility of complex traps controlled by structure and lithology. The applicability of seismic hydrocarbon detection technology applied in this paper in Xinhe area and its prediction results are useful for finding subtle traps in the northern part of Tarim Basin and even in the whole Tianshannan area. Important guiding significance.
【学位授予单位】：西北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13
，
本文编号：2173866
[Abstract]:Xinhe area is located in Tianshannan area in northern Tarim Basin, Xinjiang. It is located in the combination area of Kuqa depression and Shaya uplift, and is the key zone of fault development and oil and gas accumulation. However, in the early stage of Sinopec, the exploration results of large-scale structural traps in Xinhe area are not good, so it is necessary to use seismic hydrocarbon detection technology to predict subtle traps in this area. On the basis of previous studies, based on the structural and sedimentary facies analysis, the energy attenuation anomaly area of the Mesozoic target horizon in the Neo-Hehe area is predicted by using seismic hydrocarbon detection technique. The possibility of oil and gas accumulation in anomalous areas is analyzed from petroleum geological conditions. When the layer contains hydrocarbon, especially gas, the absorption and attenuation coefficient of the formation will become larger. When the seismic wave passes through, it will show the characteristic of "low frequency resonance and high frequency attenuation". The new and three-dimensional seismic data volumes in time domain are divided into discrete energy data volumes of 5Hz in frequency domain by discrete Fourier transform to detect hydrocarbons for Mesozoic target horizon. There is a favorable oil-gas bearing area in the Triassic target horizon of Ha-Hattang formation in Xinhe area, which mainly comes from the continental source rocks of Triassic in Kuqa depression, and migrates from the internal depression to the structural slope zone, and the oil and gas mainly come from the continental source rocks of the Triassic in the Kuqa Depression. Under the action of mudstone caprock plugging at the top of the Hafatang formation and fault occlusion at the high position, the oil and gas exists in the sandstone reservoir of the Triassic Hala Hattang formation, and the formed fault exists. The possibility of complex traps controlled by structure and lithology. The target strata of the Cretaceous in the Xinhe area are the Brazilian cap formation and the upper part of the Shushanhe formation, which are favorable for oil and gas, mainly from the main source rocks from Cambrian to Ordovician, and under the action of the shallow Cretaceous strike-slip extensional and tensional fault system. Along the fault channel or unconformable surface, the effective reservoirs of the Brazilian cap formation and the Shushanhe formation are migrated to the shallow layer, and under the action of sealing the mudstone at the top of the overlying Brazil cap formation and blocking the faults at the high part of the structure, there are formed faults. The possibility of complex traps controlled by structure and lithology. The applicability of seismic hydrocarbon detection technology applied in this paper in Xinhe area and its prediction results are useful for finding subtle traps in the northern part of Tarim Basin and even in the whole Tianshannan area. Important guiding significance.
【学位授予单位】：西北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13
，
本文编号：2173866
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