吐哈油田低饱和度油藏地质工程一体化效益勘探实践

doi:10.3969/j.issn.1672-7703.2017.01.006

摘要/Abstract

摘要： 吐哈油田近年来在吐哈盆地台北凹陷中—下侏罗统水西沟群低饱和度油藏勘探上取得重要突破，红台地区发现了规模整装储量并快速建产，区域扩展取得多个领域的突破与进展，开辟出一个勘探前景良好的增储建产新领域，实现了复杂类型油气藏的效益勘探。这一勘探重要发现得益于勘探思路的转变和技术进步。吐哈油田借鉴致密油勘探思路，积极推广应用水平井+体积压裂工艺改造技术，地质工程一体化攻关台北凹陷低渗低饱和度油藏，深化成藏机理研究，准确预测储层甜点；科学设计水平井轨迹及方位，强化长水平段工程地质导向及轨迹跟踪，有效提高水平井储层钻遇率；根据油藏特性，优化体积压裂规模和工艺参数，全过程开展地质工程一体化攻关，有力助推勘探获得重要突破；强化成熟技术集成配套，持续推进钻井提速；优化井身结构和完井方式，优化管串设计和固井工艺技术；多措并举，强化工程降本增效，进一步提高低饱和度油藏勘探开发效益。当前应对低品位储量要牢固树立效益勘探的理念，找准主要控制因素是地质工程一体化破解勘探瓶颈的关键，坚持地质工程一体化是实现低品位储量效益动用的保障。

关键词: 吐哈盆地, 红台地区, 低饱和度油藏, 水平井, 体积压裂, 地质工程一体化, 效益勘探

Abstract: In recent years, significant breakthroughs have been realized in the exploration of the Middle-Lower Jurassic Xigou Group lowsaturation oil reservoirs in the Taibei depression, the Tuha Basin. In the Hongtai area, large-scale monoblock reserves were discovered and the productivity construction has been started promptly. Breakthrough and progress of regional expansion has been made in multiple fields. Thus, a new field of reserve enhancement and productivity construction with promising exploration prospect is uncovered and the beneficial exploration of complex oil and gas reservoirs is realized. This important discovery benefits from the transformation of exploration ideas and the technical advancement. With reference to the principle of tight oil exploration, the Tuha Oilfield is developed by certain procedures. First, promote the stimulation technology of horizontal well+volume fracturing, apply the geology-engineering integration technology to explore the low-permeability and low-saturation oil reservoirs in the Taibei depression, and deepen the investigation of hydrocarbon accumulation mechanisms to predict sweet spots of reservoirs accurately. Second, design the trajectory and orientation of horizontal wells scientifically and strengthen the engineering geosteering and trajectory tracking of horizontal sections to increase the reservoir drilling ratio of horizontal wells effectively. Third, optimize the scale and technological parameters of volume fracturing according to the characteristics of oil reservoirs, and apply the geology-engineering integration during the whole process to promote the significant exploration breakthrough. Fourth, strengthen the integration of mature technologies and enhance ROP continuously. Fifth, optimize casing program, well completion mode, pipe string design and cementing technologies. And sixth, take various measures to strengthen the cost reduction and efficiency improvement. For the low-grade reserves, it is necessary to uphold firmly the concept of beneficial exploration. For purpose of geology-engineering integration, it is essential to identify the main control factors accurately. In general, the geology-engineering integration is critical for guaranteeing the beneficial production of low-grade reserves.

Key words: Tuha Basin, Hongtai area, low-saturation oil reservoir, horizontal well, volume fracturing, geology-engineering integration, beneficial exploration

中图分类号:

TE313

王昕, 杨斌, 王瑞. 吐哈油田低饱和度油藏地质工程一体化效益勘探实践[J]. 中国石油勘探, 2017, 22(1): 38-45.

Wang Xin, Yang Bin, Wang Rui. Beneficial exploration based on geology-engineering integration in low-saturation oil reservoirs of Tuha Oilfield[J]. China Petroleum Exploration, 2017, 22(1): 38-45.

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