CN110334841A - 多信息融合的海上深层致密油气藏“甜点”预测方法 - Google Patents
多信息融合的海上深层致密油气藏“甜点”预测方法 Download PDFInfo
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Abstract
本发明公开了一种多信息融合的海上深层致密油气藏“甜点”预测方法，其核心是从分析“甜点”的生、储、盖、运、圈、保多重地质要素出发，通过地质、地震、测井等资料反演出控制“甜点”发育的关键地质条件，再利用三维可视化技术呈现出以上多个关键地质因素的分布特征及其匹配关系，最终进行“甜点”的三维预测。该方法可有效提高海上深层致密油气藏“甜点”预测的准确性和全面性，克服了现有技术存在的缺陷。
Description
技术领域
本发明涉及石油、天然气勘探技术，尤其涉及一种海上深层致密油气藏“甜点”预测方法。
背景技术
海上深层致密油气藏“甜点”指埋深为3500～4500m的海上深层低渗透地层中，具有一定油气产出能力的区域。海上深层致密油气藏属于全球油气工业发展的新领域之一。由于此类油气藏面临海上、少井、深层、强非均质性、高成本等难题，在勘探开发工作全面实施之前，对其“甜点”进行精准预测尤为关键。
海上深层致密油气藏“甜点”的形成，需要具备良好的生(烃源岩)、储(具一定孔渗的储集层)、盖(能封堵油气的岩层)、运(油气运移条件)、圈(适于油气成藏的圈闭条件)、保(温度、压力等必要的油气保存条件)及以上条件的优质组合。
现阶段海上深层致密油气藏“甜点”的预测主要集中在优质储层砂体和含油气性等方面。忽视了当储层砂体质量一般，其他生、盖、运、圈、保条件非常适宜的情况下也会形成“甜点”的可能性。导致“甜点”预测不全，极大地减少了油田的采出程度。且目前“甜点”的预测结果多为二维，既没有充分挖掘三维地震资料等信息，又无法让人准确了解“甜点”的纵向分布特征，降低了海上深层致密油气藏勘探开发的针对性和有效性。
发明内容
为合理解决以上问题，本发明提出了一种多信息融合的海上深层致密油气藏“甜点”预测方法，有望进一步提高海上深层致密油气藏“甜点”预测的准确性和时效性。
该方法从分析“甜点”的生、储、盖、运、圈、保多重地质要素出发，通过地质、地震、测井等资料反演出控制“甜点”发育的关键地质条件，再利用三维可视化技术呈现出以上多个关键地质因素的分布特征及其匹配关系，最终进行“甜点”的三维预测。该方法可有效提高海上深层致密油气藏“甜点”预测的准确性和全面性，克服了现有技术存在的缺陷。
为达到以上目的，本发明提供以下技术方案。
多信息融合的海上深层致密油气藏“甜点”预测方法，其核心是“甜点”主控地质因素的三维空间分布特征及其匹配关系的呈现。该方法依次包括以下步骤：
(1)从生、储、盖、运、圈、保六个方面出发，明确海上深层致密油气藏“甜点”发育的主控因素；
所述的生包括烃源岩；所述的储包括古地貌、沉积相、砂体展布、成岩相、物性、异常高压、含油性；所述的盖包括盖层，所述的运包括断裂、不整合面、裂缝；所述的圈包括岩性圈闭、构造圈闭，所述的保包括区域性盖层、大地构造环境、水动力环境。
(2)用地质、地震、测井资料反演以上“甜点”主控因素，并明确其分布特征；
(3)用三维可视化技术呈现出“甜点”主控因素的分布特征及空间匹配关系；
(4)利用多重地质信息的耦合关系预测“甜点”分布区。
附图说明
图1为本发明流程示意图。
具体实施方式
结合附图说明本发明的具体实施方式。
如图1所示，多信息融合的海上深层致密油气藏“甜点”预测方法，依次包括以下详细步骤：
步骤一：通过文献调研和地质分析，明确海上深层致密油气藏“甜点”的主控因素，包括：烃源岩、古地貌、沉积相、砂体展布、成岩相、物性、异常高压、含油性、盖层、构造作用、圈闭条件及保存条件。
步骤二：以已有的地质和测井资料为基础，找出以上“甜点”主控因素的地震、测井敏感属性，对“甜点”主控因素的特征参数进行反演。
步骤三：利用三维可视化技术，对“甜点”主控因素的规模、空间分布特征及各因素的匹配关系进行呈现。
步骤四：根据各地质条件的发育规模、分布特征及匹配关系进行“甜点”预测。
Claims (2)
1.多信息融合的海上深层致密油气藏“甜点”预测方法，其特征在于，包括以下步骤：
(1)从生、储、盖、运、圈、保六个方面出发，明确海上深层致密油气藏“甜点”发育的主控因素；
(2)用地质、地震、测井资料反演以上“甜点”主控因素，并明确其分布特征；
(3)用三维可视化技术呈现出“甜点”主控因素的分布特征及空间匹配关系；
(4)利用多重地质信息的耦合关系预测“甜点”分布区。
2.根据权利要求1所述的多信息融合的海上深层致密油气藏“甜点”预测方法，其特征在于，所述的生包括烃源岩；所述的储包括古地貌、沉积相、砂体展布、成岩相、物性、异常高压、含油性；所述的盖包括盖层，所述的运包括断裂、不整合面、裂缝；所述的圈包括岩性圈闭、构造圈闭，所述的保包括区域性盖层、大地构造环境、水动力环境。
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