I am sorry to hear of your dilemma. I realize how frustrating this is for you and I hope to provide you information which is accurate and useful, even though it may not be the news you were hoping to get. I just ask that you not shoot the messenger.
To answer your question, you are positively being targeted in a very common online romance scam that we see dozens of times a month.
This person is not from US and has no intention of ever meeting you in person. He is not working on an oil rig. He is not in custody, or under arrest. If they want you to send money to Istanbul it is because they are from there and have always been there.
Usually, they want you to start getting use to sending them small amounts of money so that they can gradually increase the requested amounts.
The only purpose this person has in maintaining a relationship is to use you for a steady income stream and get as much money from you as they can before they disappear.
I am sorry. I wish I could tell you otherwise, but I do not want you spinning your wheels on this.
Do not continue corresponding with this person. They will say whatever they think is necessary to keep you on the hook. Block them from your phone and social media. This person is a criminal and deserves no explanation.
You can report this to the FBI online at www.ic3.gov
I hope I’ve provided the information you were seeking. If you need more help, please let me know so l can continue to assist you.
Did you have any further questions about this?