地热能

为犹他州卡普项目设计的破纪录增强型地热系统

本文描述了为犹他州 Cape 项目增强型地热系统中的井压裂处理和井间距设计而进行的建模工作。

图 1——基线模拟中的裂缝几何形状和支撑剂放置情况。
图 1——基线模拟中的裂缝几何形状和支撑剂放置情况。
来源：URTeC 4245311。

增强型地热系统（EGS）旨在利用水力压裂技术，从高温低渗透地层中钻探的井中获得高流量。位于犹他州的Cape项目是一个正在进行的EGS项目，计划装机容量为400兆瓦。在初始循环测试中，该项目钻探的首口生产井的流量超过100公斤/秒（54,000桶/天），创下了EGS项目的新纪录。本文将介绍为设计压裂处理方案和井间距而进行的建模工作。

介绍

在增强型地热系统中，采用水力压裂法来提高地热井的流量。

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Geothermal energy

Record-Breaking Enhanced Geothermal System Designed for Project Cape, Utah

This paper describes modeling work performed to design fracturing treatment and spacing for wells in the Project Cape enhanced geothermal system in Utah.

Fig. 1—Fracture geometry and proppant placement from the baseline simulation.
Fig. 1—Fracture geometry and proppant placement from the baseline simulation.
Source: URTeC 4245311.

Enhanced geothermal systems (EGS) seek to use hydraulic fracturing to achieve high flow rates from wells drilled in formations with high temperature but low permeability. Project Cape in Utah is an ongoing EGS project with a planned capacity of 400 MWe. In an initial circulation test, the first production well drilled for the project flowed at more than 100 kg/s (54,000 B/D), a record for an EGS project. In this paper, modeling work performed to design the fracturing treatment and spacing for the wells is described.

Introduction

In EGS, hydraulic stimulation is used to improve the flow rate that can be achieved through geothermal wells.

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